Or-tools: Windows net452 framework is broken

Created on 29 Jan 2020  ·  84Comments  ·  Source: google/or-tools

Details: Version: 7.5 from NuGet, Windows 10, C#, Routing Solver,

I built the project and when calling it (via URL) the code reached the part that initializes the IndexManager, with valid parameters, and gets an immediate exception:

RoutingIndexManager manager = new RoutingIndexManager(number_of_locations, number_of_vehicles, vehicle_starts_, vehicle_ends_);

**<InnerException>**
<Message>An error has occurred.</Message>
<ExceptionMessage>
 'SWIGExceptionHelper'.
</ExceptionMessage>
<ExceptionType>System.TypeInitializationException</ExceptionType>
<StackTrace>
ב- Google.OrTools.ConstraintSolver.operations_research_constraint_solverPINVOKE.SWIGExceptionHelper..ctor() ב- Google.OrTools.ConstraintSolver.operations_research_constraint_solverPINVOKE..cctor()
</StackTrace>
<InnerException>
<Message>An error has occurred.</Message>
<ExceptionMessage>
Cannot load DLL 'google-ortools-native'. Access is denied. (HRESULT: 0x80070005 (E_ACCESSDENIED))
</ExceptionMessage>
<ExceptionType>System.DllNotFoundException</ExceptionType>
<StackTrace>
Google.OrTools.ConstraintSolver.operations_research_constraint_solverPINVOKE.SWIGExceptionHelper.SWIGRegisterExceptionCallbacks_operations_research_constraint_solver(ExceptionDelegate applicationDelegate, ExceptionDelegate arithmeticDelegate, ExceptionDelegate divideByZeroDelegate, ExceptionDelegate indexOutOfRangeDelegate, ExceptionDelegate invalidCastDelegate, ExceptionDelegate invalidOperationDelegate, ExceptionDelegate ioDelegate, ExceptionDelegate nullReferenceDelegate, ExceptionDelegate outOfMemoryDelegate, ExceptionDelegate overflowDelegate, ExceptionDelegate systemExceptionDelegate) ב- Google.OrTools.ConstraintSolver.operations_research_constraint_solverPINVOKE.SWIGExceptionHelper..cctor()
</StackTrace>
</InnerException>
</InnerException>
</Error>
Bug .NET Windows Routing Solver
Source
picture GuyBenhaim

All 84 comments

This was working fine with 6.X, can we duplicate what was done in that makefile?
Any 7.X (0

GuyBenhaim picture GuyBenhaim on 29 Jan 2020

Which Target Framework Moniker are you using ? We moved to .Net Core around 6.X to 7.X IIRC

Mizux picture Mizux on 29 Jan 2020

@Mizux ,
For 6.X I was using .Net Framework 4.5.2 for 7.5 I'm using .Net Framework 4.7.2
I understood that from 7.4 both Core and .NetFramework are supported.

GuyBenhaim picture GuyBenhaim on 30 Jan 2020

Is a hotfix planned for this issue?
I just have waited for 7.5 to fix the signing issue.
Now its fixed but or-tools still seems unusable for .net web projects

m0ddixx picture m0ddixx on 30 Jan 2020

Currently investigating what's going wrong when the packages were built...

Mizux picture Mizux on 30 Jan 2020

Thx!
Let me know if there is something I could/should do from my side.
Guy

GuyBenhaim picture GuyBenhaim on 30 Jan 2020

seems to be an issue with net452
VrpStartsEnds.cs

// [START program]
// [START import]
using System;
using System.Collections.Generic;
using Google.OrTools.ConstraintSolver;
// [END import]

/// <summary>
///   Minimal TSP using distance matrix.
/// </summary>
public class VrpStartsEnds {
  // [START data_model]
  class DataModel {
    public long[,] DistanceMatrix = {
      {0, 548, 776, 696, 582, 274, 502, 194, 308, 194, 536, 502, 388, 354, 468, 776, 662},
      {548, 0, 684, 308, 194, 502, 730, 354, 696, 742, 1084, 594, 480, 674, 1016, 868, 1210},
      {776, 684, 0, 992, 878, 502, 274, 810, 468, 742, 400, 1278, 1164, 1130, 788, 1552, 754},
      {696, 308, 992, 0, 114, 650, 878, 502, 844, 890, 1232, 514, 628, 822, 1164, 560, 1358},
      {582, 194, 878, 114, 0, 536, 764, 388, 730, 776, 1118, 400, 514, 708, 1050, 674, 1244},
      {274, 502, 502, 650, 536, 0, 228, 308, 194, 240, 582, 776, 662, 628, 514, 1050, 708},
      {502, 730, 274, 878, 764, 228, 0, 536, 194, 468, 354, 1004, 890, 856, 514, 1278, 480},
      {194, 354, 810, 502, 388, 308, 536, 0, 342, 388, 730, 468, 354, 320, 662, 742, 856},
      {308, 696, 468, 844, 730, 194, 194, 342, 0, 274, 388, 810, 696, 662, 320, 1084, 514},
      {194, 742, 742, 890, 776, 240, 468, 388, 274, 0, 342, 536, 422, 388, 274, 810, 468},
      {536, 1084, 400, 1232, 1118, 582, 354, 730, 388, 342, 0, 878, 764, 730, 388, 1152, 354},
      {502, 594, 1278, 514, 400, 776, 1004, 468, 810, 536, 878, 0, 114, 308, 650, 274, 844},
      {388, 480, 1164, 628, 514, 662, 890, 354, 696, 422, 764, 114, 0, 194, 536, 388, 730},
      {354, 674, 1130, 822, 708, 628, 856, 320, 662, 388, 730, 308, 194, 0, 342, 422, 536},
      {468, 1016, 788, 1164, 1050, 514, 514, 662, 320, 274, 388, 650, 536, 342, 0, 764, 194},
      {776, 868, 1552, 560, 674, 1050, 1278, 742, 1084, 810, 1152, 274, 388, 422, 764, 0, 798},
      {662, 1210, 754, 1358, 1244, 708, 480, 856, 514, 468, 354, 844, 730, 536, 194, 798, 0}
    };
    public int VehicleNumber = 4;
    // [START starts_ends]
    public int[] Starts = {1, 2, 15, 16};
    public int[] Ends = {0, 0, 0, 0};
    // [END starts_ends]
  };
  // [END data_model]

  // [START solution_printer]
  /// <summary>
  ///   Print the solution.
  /// </summary>
  static void PrintSolution(
      in DataModel data,
      in RoutingModel routing,
      in RoutingIndexManager manager,
      in Assignment solution) {
    // Inspect solution.
    long maxRouteDistance = 0;
    for (int i = 0; i < data.VehicleNumber; ++i) {
      Console.WriteLine("Route for Vehicle {0}:", i);
      long routeDistance = 0;
      var index = routing.Start(i);
      while (routing.IsEnd(index) == false) {
        Console.Write("{0} -> ", manager.IndexToNode((int)index));
        var previousIndex = index;
        index = solution.Value(routing.NextVar(index));
        routeDistance += routing.GetArcCostForVehicle(previousIndex, index, 0);
      }
      Console.WriteLine("{0}", manager.IndexToNode((int)index));
      Console.WriteLine("Distance of the route: {0}m", routeDistance);
      maxRouteDistance = Math.Max(routeDistance, maxRouteDistance);
    }
    Console.WriteLine("Maximum distance of the routes: {0}m", maxRouteDistance);
  }
  // [END solution_printer]

  public static void Main(String[] args) {
    // Instantiate the data problem.
    // [START data]
    DataModel data = new DataModel();
    // [END data]

    // Create Routing Index Manager
    // [START index_manager]
    RoutingIndexManager manager = new RoutingIndexManager(
        data.DistanceMatrix.GetLength(0),
        data.VehicleNumber,
        data.Starts,
        data.Ends);
    // [END index_manager]

    // Create Routing Model.
    // [START routing_model]
    RoutingModel routing = new RoutingModel(manager);
    // [END routing_model]

    // Create and register a transit callback.
    // [START transit_callback]
    int transitCallbackIndex = routing.RegisterTransitCallback(
      (long fromIndex, long toIndex) => {
        // Convert from routing variable Index to distance matrix NodeIndex.
        var fromNode = manager.IndexToNode(fromIndex);
        var toNode = manager.IndexToNode(toIndex);
        return data.DistanceMatrix[fromNode, toNode]; }
    );
    // [END transit_callback]

    // Define cost of each arc.
    // [START arc_cost]
    routing.SetArcCostEvaluatorOfAllVehicles(transitCallbackIndex);
    // [END arc_cost]

    // Add Distance constraint.
    // [START distance_constraint]
    routing.AddDimension(transitCallbackIndex, 0, 2000,
                         true,  // start cumul to zero
                         "Distance");
    RoutingDimension distanceDimension = routing.GetMutableDimension("Distance");
    distanceDimension.SetGlobalSpanCostCoefficient(100);
    // [END distance_constraint]

    // Setting first solution heuristic.
    // [START parameters]
    RoutingSearchParameters searchParameters =
      operations_research_constraint_solver.DefaultRoutingSearchParameters();
    searchParameters.FirstSolutionStrategy =
      FirstSolutionStrategy.Types.Value.PathCheapestArc;
    // [END parameters]

    // Solve the problem.
    // [START solve]
    Assignment solution = routing.SolveWithParameters(searchParameters);
    // [END solve]

    // Print solution on console.
    // [START print_solution]
    PrintSolution(data, routing, manager, solution);
    // [END print_solution]
  }
}
// [END program]

VrpStartsEnds.csproj:

<Project Sdk="Microsoft.NET.Sdk">
  <PropertyGroup>
    <OutputType>Exe</OutputType>
    <LangVersion>7.3</LangVersion>
    <TargetFramework>netcoreapp2.1</TargetFramework>
    <EnableDefaultItems>false</EnableDefaultItems>
    <!-- see https://github.com/dotnet/docs/issues/12237 -->
    <RollForward>LatestMajor</RollForward>
    <RestoreSources>$(RestoreSources);https://api.nuget.org/v3/index.json</RestoreSources>
    <AssemblyName>Google.OrTools.VrpStartsEnds</AssemblyName>
    <IsPackable>true</IsPackable>
  </PropertyGroup>

  <PropertyGroup Condition=" '$(Configuration)|$(Platform)' == 'Debug|AnyCPU' ">
    <DebugType>full</DebugType>
    <Optimize>true</Optimize>
    <GenerateTailCalls>true</GenerateTailCalls>
  </PropertyGroup>

  <ItemGroup>
    <Compile Include="VrpStartsEnds.cs" />
    <PackageReference Include="Google.OrTools" Version="7.5.*" />
  </ItemGroup>
</Project>

it's working....

if I change in VrpStartsEnds.csproj:

-     <TargetFramework>netcoreapp2.1</TargetFramework>
+     <TargetFramework>net452</TargetFramework>

observed

dotnet nuget locals all --clear
dotnet build
dotnet run

Unhandled Exception: System.TypeInitializationException: The type initializer for 'Google.OrTools.ConstraintSolver.operations_research_constraint_solverPINVOKE' threw an exception. ---> System.TypeInitializationException: The type initializer for 'SWIGExceptionHelper' threw an exception. ---> System.DllNotFoundException: Unable to l
oad DLL 'google-ortools-native': The specified module could not be found. (Exception from HRESULT: 0x8007007E)
   at Google.OrTools.ConstraintSolver.operations_research_constraint_solverPINVOKE.SWIGExceptionHelper.SWIGRegisterExceptionCallbacks_operations_research_constraint_solver(ExceptionDelegate applicationDelegate, ExceptionDelegate arithmeticDelegate, ExceptionDelegate divideByZeroDelegate, ExceptionDelegate indexOutOfRangeDelegate, Ex
ceptionDelegate invalidCastDelegate, ExceptionDelegate invalidOperationDelegate, ExceptionDelegate ioDelegate, ExceptionDelegate nullReferenceDelegate, ExceptionDelegate outOfMemoryDelegate, ExceptionDelegate overflowDelegate, ExceptionDelegate systemExceptionDelegate)
   at Google.OrTools.ConstraintSolver.operations_research_constraint_solverPINVOKE.SWIGExceptionHelper..cctor()
   --- End of inner exception stack trace ---
   at Google.OrTools.ConstraintSolver.operations_research_constraint_solverPINVOKE.SWIGExceptionHelper..ctor()
   at Google.OrTools.ConstraintSolver.operations_research_constraint_solverPINVOKE..cctor()
   --- End of inner exception stack trace ---
   at Google.OrTools.ConstraintSolver.operations_research_constraint_solverPINVOKE.new_RoutingIndexManager__SWIG_1(Int32 jarg1, Int32 jarg2, Int32 length3, Int32[] jarg3, Int32 length4, Int32[] jarg4)
   at VrpStartsEnds.Main(String[] args) in C:\Users\corentinl\work\1862\VrpStartsEnds.cs:line 91
Mizux picture Mizux on 30 Jan 2020

what happens if you put
<TargetFramework>net452;netcoreapp2.1</TargetFramework>
I'd suggest it will find a compromise between the 2 sdk versions

m0ddixx picture m0ddixx on 30 Jan 2020
😕1

if I copy .nuget\packages\google.ortools.runtime.win-x64\7.5.7466\runtimes\win-x64\native\google-ortools-native.dll in bin\Debug\net452\google-ortools-native.dll it works

So it seems in net452 we are missing something...

note: on the contrary we have a bin\Debug\netcoreapp2.1\Google.OrTools.VrpStartsEnds.deps.json
with

     "Google.OrTools.runtime.win-x64/7.5.7466": {
        "runtimeTargets": {
          "runtimes/win-x64/native/google-ortools-native.dll": {
            "rid": "win-x64",
            "assetType": "native",
            "fileVersion": "0.0.0.0"
          }
        }
      },
Mizux picture Mizux on 30 Jan 2020

@m0ddixx you'll need to use <TargetFrameworks> and basically it compile two times...

Mizux picture Mizux on 30 Jan 2020

oh right.
if you fix the issue, is there a chance you upload it to the nuget repository or do we need to wait for the 7.6 release? Latter would mean I have to reschedule some work for my project which would be very helpful to be answered. Thanks in advance for your help

m0ddixx picture m0ddixx on 30 Jan 2020

In the proj file I've got: v4.7.2
But also:

..\packages\Google.OrTools.7.5.7466\lib*net452\Google.OrTools.dll


..\packages\Google.Protobuf.3.11.2\lib*net45\Google.Protobuf.dll

GuyBenhaim picture GuyBenhaim on 30 Jan 2020

I tried building as 4.5.2 and ORT 7.5

The project builds, but after running it the program immediately crashes when reaching:
RoutingIndexManager manager = new RoutingIndexManager(number_of_locations, number_of_vehicles, vehicle_starts_, vehicle_ends_);

With exception message:
Access is denied. (- HRESULT: 0x80070005 (E_ACCESSDENIED))

...

GuyBenhaim picture GuyBenhaim on 30 Jan 2020

Managed to make it work using:

diff --git a/ortools/dotnet/Google.OrTools.runtime.win-x64/Google.OrTools.runtime.win-x64.csproj.in b/ortools/dotnet/Google.OrTools.runtime.win-x64/Google.OrTools.runtime.win-x64.csproj.in
index 2b7692853..fc187fe9e 100644
--- a/ortools/dotnet/Google.OrTools.runtime.win-x64/Google.OrTools.runtime.win-x64.csproj.in
+++ b/ortools/dotnet/Google.OrTools.runtime.win-x64/Google.OrTools.runtime.win-x64.csproj.in
@@ -29,13 +29,14 @@
       <Pack>true</Pack>
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>
-
-    <!-- For netframework we need to copy the native binary manually during build on Nuget consumer side. That's why we need a separate target file doing this for us. -->
-    <Content Include="$(MSBuildThisFileDirectory)\Google.OrTools.runtime.win-x64.targets">
-      <PackagePath>build/net45/%(Filename)%(Extension)</PackagePath>
+    <!-- Except for net452 TFM see #1862 -->
+    <Content Include="../../../lib/$(AssemblyName).dll">
+      <PackagePath>lib/net452/%(Filename)%(Extension)</PackagePath>
       <Pack>true</Pack>
       <CopyToOutputDirectory>PreserveNewest</CopyToOutputDirectory>
     </Content>
+
+    <!-- For netframework we need to copy the native binary manually during build on Nuget consumer side. That's why we need a separate target file doing this for us. -->
     <Content Include="$(MSBuildThisFileDirectory)\Google.OrTools.runtime.win-x64.targets">
        <PackagePath>build/netstandard2.0/%(Filename)%(Extension)</PackagePath>
        <Pack>true</Pack>

related to:
https://docs.microsoft.com/en-us/nuget/create-packages/supporting-multiple-target-frameworks#framework-version-folder-structure

Mizux picture Mizux on 30 Jan 2020

Great news.
Can you please explain the steps to take?

GuyBenhaim picture GuyBenhaim on 30 Jan 2020
👍1

ugly hack using a powershell:
First you must know the location of your nuget package cache using:

dotnet nuget locals all --list

Then you can hack the google.ortools.runtime.win-x64 package :smiley_cat: 

cd .nuget\packages\google.ortools.runtime.win-x64\7.5.7466
mkdir -p lib/net452
cp .\runtimes\win-x64\native\google-ortools-native.dll .\lib\net452\
Mizux picture Mizux on 30 Jan 2020

Where do I do this?

GuyBenhaim picture GuyBenhaim on 30 Jan 2020
😕1

I copied google-ortools-native.dll from here:
packages\Google.OrTools.runtime.win-x64.7.5.7466\runtimes\win-x64\native
to here:
\packages\Google.OrTools.7.5.7466\lib\net452

Same exception ....

GuyBenhaim picture GuyBenhaim on 30 Jan 2020

you must do it in the nuget cache, did you try packages\Google.OrTools.runtime.win-x64.7.5.7466\lib\net452

Mizux picture Mizux on 30 Jan 2020

There is no \lib there
Only directories: build, content, runtimes

I have lib under \packages\Google.OrTools.7.5.7466\lib\net452

GuyBenhaim picture GuyBenhaim on 30 Jan 2020

I cleared the nuget cache.
nothing there.
Still, getting the exception

GuyBenhaim picture GuyBenhaim on 30 Jan 2020

There is no \lib there
Only directories: build, content, runtimes

I have lib under \packages\Google.OrTools.7.5.7466\lib\net452

You should create the lib folder and copy the dll from the runtime directory.
I couldn't test this yet. I have to verify this tomorrow.

m0ddixx picture m0ddixx on 30 Jan 2020

I copied the native dll from:
packages\Google.OrTools.runtime.win-x64.7.5.7466\runtimes\win-x64\native
to"
.nuget\packagesgoogle.ortools.runtime.win-x64\7.5.7466\lib\net452

Same exception

GuyBenhaim picture GuyBenhaim on 30 Jan 2020

Tomorrow. BB.

GuyBenhaim picture GuyBenhaim on 30 Jan 2020

Can you add:

<CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>

to your csproj file. Due to any change in the nuget the native dll google-ortools-native.dll is not copied to output directory anymore. The above setting should fix that.

ConsoleApp1.zip

ptr1120 picture ptr1120 on 31 Jan 2020

Peter,
What do you mean by "output directory" ?
At least for me, manually copying google-ortools-native.dll to the nuget cache did not help in avoiding the exception.
Thx

GuyBenhaim picture GuyBenhaim on 31 Jan 2020

I mean the build output directory, where all files go during build. Did you also try my suggestion?

ptr1120 picture ptr1120 on 31 Jan 2020

For me it is not working.
At least for the ASP.Net Project.

Can you add:

<CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies>

to your csproj file. Due to any change in the nuget the native dll google-ortools-native.dll is not copied to output directory anymore. The above setting should fix that.

ConsoleApp1.zip

m0ddixx picture m0ddixx on 31 Jan 2020

you mean adding to .csproj?

GuyBenhaim picture GuyBenhaim on 31 Jan 2020

i tried the solution by @Mizux with and without the added line to the .csproj file with no success

m0ddixx picture m0ddixx on 31 Jan 2020

Same here: added to .csproj -> same exception ....

GuyBenhaim picture GuyBenhaim on 31 Jan 2020

Yes, add this line to csproj tp the first PropertyGroup. Please also look at my uploaded example Project ConsoleApp1.zip. This is a NetFramework Console Project with this setting in csproj, which works for me.
For the other users with problems: What is the failure message? Did you try the uploaded ConsoleApp1.zip and is it working on your side? Did you try to create a new Project with installing newest ortools in order to exclude side-effects in your specific configuration?

ptr1120 picture ptr1120 on 31 Jan 2020

I think OP and I are using ortools within a web application. I could test this with a console application, but that wouldn't fix the issue right away

m0ddixx picture m0ddixx on 31 Jan 2020

In my case the main project is a ClassLibrary and uses webAPI.
The or-tools example-projects build and run for me, no issues. The problem is with the WebProject.

GuyBenhaim picture GuyBenhaim on 31 Jan 2020

Interestingly running your project crashes immediately when reaching :
RoutingIndexManager manager = new RoutingIndexManager(
data.DistanceMatrix.GetLength(0),
data.VehicleNumber,
data.Starts,
data.Ends);

Exception Details:

System.TypeInitializationException
HResult=0x80131534
Message=The type initializer for 'Google.OrTools.ConstraintSolver.operations_research_constraint_solverPINVOKE' threw an exception.
Source=Google.OrTools
StackTrace:
at Google.OrTools.ConstraintSolver.operations_research_constraint_solverPINVOKE.new_RoutingIndexManager__SWIG_1(Int32 jarg1, Int32 jarg2, Int32 length3, Int32[] jarg3, Int32 length4, Int32[] jarg4)
at Google.OrTools.ConstraintSolver.RoutingIndexManager..ctor(Int32 num_nodes, Int32 num_vehicles, Int32[] starts, Int32[] ends)
at ConsoleApp1.Program.Main(String[] args) in C:\Users\guy\Documents\Temp\ConsoleApp1\ConsoleApp1\ConsoleApp1\Program.cs:line 91

Inner Exception 1:
TypeInitializationException: The type initializer for 'SWIGExceptionHelper' threw an exception.

Inner Exception 2:
DllNotFoundException: Unable to load DLL 'google-ortools-native': The specified module could not be found. (Exception from HRESULT: 0x8007007E)

GuyBenhaim picture GuyBenhaim on 31 Jan 2020

Doing VS "Clean Solution" for your project, now allows it to run. Nice.

But doing the same for mine, does not help ...

GuyBenhaim picture GuyBenhaim on 31 Jan 2020

This is the path in csproj:

..\packages\Google.OrTools.7.5.7466\lib\net452\Google.OrTools.dll

I copied again manually ...native.dll to this directory. Same problem.

GuyBenhaim picture GuyBenhaim on 31 Jan 2020

Rereading #1500 and https://docs.microsoft.com/en-us/nuget/create-packages/supporting-multiple-target-frameworks#architecture-specific-folders
I'm still not convincing if:

  1. Using a Target File to copy the google-ortools-native.dll was a right move
  2. Since our native google-ortools-native.dll is intended to be used by a net452 TFM should we put it in runtimes/win-x64/lib/net452/ instead of runtimes/win-x64/native. i.e. does native is not for C++ nuget package which is not exactly our case
    https://github.com/google/or-tools/blob/858fa626959f7e386153af82756384b79f983b5a/ortools/dotnet/Google.OrTools.runtime.win-x64/Google.OrTools.runtime.win-x64.csproj.in#L27-L28
  3. Why when using netcorapp2.1 or netcoreapp3.1 as TFM it magically work and do the right thing (i.e. copying the google-ortools-native.dll in the bin folder)
Mizux picture Mizux on 31 Jan 2020

@ptr1120 I'm pretty sure I'm wrong, but your App csproj seems cheating to me.

I mean at the end of "ConsoleApp1.csproj", we can show:

  <Import Project="..\packages\Google.OrTools.runtime.win-x64.7.5.7466\build\net45\Google.OrTools.runtime.win-x64.targets" Condition="Exists('..\packages\Google.OrTools.runtime.win-x64.7.5.7466\build\net45\Google.OrTools.runtime.win-x64.targets')" />
  <Target Name="EnsureNuGetPackageBuildImports" BeforeTargets="PrepareForBuild">
    <PropertyGroup>
      <ErrorText>This project references NuGet package(s) that are missing on this computer. Use NuGet Package Restore to download them.  For more information, see http://go.microsoft.com/fwlink/?LinkID=322105. The missing file is {0}.</ErrorText>
    </PropertyGroup>
    <Error Condition="!Exists('..\packages\Google.OrTools.runtime.win-x64.7.5.7466\build\net45\Google.OrTools.runtime.win-x64.targets')" Text="$([System.String]::Format('$(ErrorText)', '..\packages\Google.OrTools.runtime.win-x64.7.5.7466\build\net45\Google.OrTools.runtime.win-x64.targets'))" />
  </Target>

so it seems you "manually" call the .targets file while we would like for users to be able to consume it by simply adding in its .csproj:

    <PackageReference Include="Google.OrTools" Version="7.5.*" />

note: also your sample provide a packages.config and contains <HintPath>..\packages\Google.OrTools.7.5.7466\lib\net452\Google.OrTools.dll</HintPath> and the property CopyLocalLockFileAssemblies

Mizux picture Mizux on 31 Jan 2020

Yes, this (Import, Target) is automatically added to the csproj by nuget when you install the nuget package. The only change I did manually is the <CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies> setting.

Also when updating the ortools using the default nuget mechanism the Target and Import is updated automatically.

ptr1120 picture ptr1120 on 31 Jan 2020

@ptr1120 <CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies> don't seems to work using dotnet build.

I did few test using:

Concerning my point 1 above, in runtime linux-x64 and macos-x64 we don't use a target file shenanigan and while targeting netcoreapp2.1 or netcoreapp3.1 native file are still copied e.g. bin/Debug/netcoreapp3.1/runtimes/win-x64/google-ortools-native.dll (ed it also copy runtimes/linux-x64 and runtime/mac-x64)
-> If I remove the build directory from nupkg it still copy files -> it seems it won't use the .target
So for netstandard2.0 (aka netcoreapp2.1) and netstandard2.1 (aka netcoreapp3.1) it seems unneeded

Concerning 2 i guess we should keep the runtimes/<platform>-x64/native

BUT when I target net452 it won't work so I would tend to say runtimes/* stuff is something only working for .net core answering my 3

Now back to net452, i was only able to see them in bin/Debug/net452 while I was adding in google-runtime-win-x64 a lib/net452/google-native....dll (and in this test I also removed the build directory)

Mizux picture Mizux on 31 Jan 2020

How do we move forward from here?

GuyBenhaim picture GuyBenhaim on 31 Jan 2020

I will also have a deeper look on that. But first some implications:

  • Nuget never worked very good with native dependencies and there is not much documentation in this concern.
  • The interplay of netcore and netframework; old csproj format and new csproj format is not working perfect especcially in edge cases like native dependencies. So if you use netframework then use msbuild (dotnet build) and the old csproj format in order to avoid side effects.

Also I would like to summarize that there are no issues consuming ortools from netcore, netstandard and netframework, except for netframework web projects. Or did I understand anything wrong.

So, as a next step it would be interesting whether ortools work in a fresh, minimal netframework web project, created with VisualStudio and ortools installed with visual studio.

@Mizux: you are right the target file is only for netframework, which works only on windows, for dotnetcore on other platforms this is not needed because netcore has a completely different assembly resolving strategy.

ptr1120 picture ptr1120 on 31 Jan 2020

Interesting. Using the default mechanisms, OrTools seems to work also with a netframework Web Project.
What I did:

  • Create a Asp.Net WebApplication project using VisualStudio (or Rider)
  • Use netframework 4.8 as target framework
  • Select MVC or WebApi as project type
  • Install newest OrTools using "Manage Nuget packages"
  • Set the platform target of the project to x64
  • Add the following code to an MVC controller:
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.Mvc;
using Google.OrTools.ConstraintSolver;

namespace WebApplication1.Controllers
{
    internal class DataModel
    {
        public long[,] DistanceMatrix = {
            {0, 548, 776, 696, 582, 274, 502, 194, 308, 194, 536, 502, 388, 354, 468, 776, 662},
            {548, 0, 684, 308, 194, 502, 730, 354, 696, 742, 1084, 594, 480, 674, 1016, 868, 1210},
            {776, 684, 0, 992, 878, 502, 274, 810, 468, 742, 400, 1278, 1164, 1130, 788, 1552, 754},
            {696, 308, 992, 0, 114, 650, 878, 502, 844, 890, 1232, 514, 628, 822, 1164, 560, 1358},
            {582, 194, 878, 114, 0, 536, 764, 388, 730, 776, 1118, 400, 514, 708, 1050, 674, 1244},
            {274, 502, 502, 650, 536, 0, 228, 308, 194, 240, 582, 776, 662, 628, 514, 1050, 708},
            {502, 730, 274, 878, 764, 228, 0, 536, 194, 468, 354, 1004, 890, 856, 514, 1278, 480},
            {194, 354, 810, 502, 388, 308, 536, 0, 342, 388, 730, 468, 354, 320, 662, 742, 856},
            {308, 696, 468, 844, 730, 194, 194, 342, 0, 274, 388, 810, 696, 662, 320, 1084, 514},
            {194, 742, 742, 890, 776, 240, 468, 388, 274, 0, 342, 536, 422, 388, 274, 810, 468},
            {536, 1084, 400, 1232, 1118, 582, 354, 730, 388, 342, 0, 878, 764, 730, 388, 1152, 354},
            {502, 594, 1278, 514, 400, 776, 1004, 468, 810, 536, 878, 0, 114, 308, 650, 274, 844},
            {388, 480, 1164, 628, 514, 662, 890, 354, 696, 422, 764, 114, 0, 194, 536, 388, 730},
            {354, 674, 1130, 822, 708, 628, 856, 320, 662, 388, 730, 308, 194, 0, 342, 422, 536},
            {468, 1016, 788, 1164, 1050, 514, 514, 662, 320, 274, 388, 650, 536, 342, 0, 764, 194},
            {776, 868, 1552, 560, 674, 1050, 1278, 742, 1084, 810, 1152, 274, 388, 422, 764, 0, 798},
            {662, 1210, 754, 1358, 1244, 708, 480, 856, 514, 468, 354, 844, 730, 536, 194, 798, 0}
        };

        public int VehicleNumber = 4;

        // [START starts_ends]
        public int[] Starts = { 1, 2, 15, 16 };

        public int[] Ends = { 0, 0, 0, 0 };
        // [END starts_ends]
    };

    public class HomeController : Controller
    {
        public ActionResult Index()
        {
            ViewBag.Title = "Home Page";
            ViewBag.Solution = Execute();

            return View();
        }

        private static string Execute()
        {
            // Instantiate the data problem.
            // [START data]
            DataModel data = new DataModel();
            // [END data]

            // Create Routing Index Manager
            // [START index_manager]
            RoutingIndexManager manager = new RoutingIndexManager(
                data.DistanceMatrix.GetLength(0),
                data.VehicleNumber,
                data.Starts,
                data.Ends);
            // [END index_manager]

            // Create Routing Model.
            // [START routing_model]
            RoutingModel routing = new RoutingModel(manager);
            // [END routing_model]

            // Create and register a transit callback.
            // [START transit_callback]
            int transitCallbackIndex = routing.RegisterTransitCallback(
              (long fromIndex, long toIndex) =>
              {
                  // Convert from routing variable Index to distance matrix NodeIndex.
                  var fromNode = manager.IndexToNode(fromIndex);
                  var toNode = manager.IndexToNode(toIndex);
                  return data.DistanceMatrix[fromNode, toNode];
              }
            );
            // [END transit_callback]

            // Define cost of each arc.
            // [START arc_cost]
            routing.SetArcCostEvaluatorOfAllVehicles(transitCallbackIndex);
            // [END arc_cost]

            // Add Distance constraint.
            // [START distance_constraint]
            routing.AddDimension(transitCallbackIndex, 0, 2000,
                                 true,  // start cumul to zero
                                 "Distance");
            RoutingDimension distanceDimension = routing.GetMutableDimension("Distance");
            distanceDimension.SetGlobalSpanCostCoefficient(100);
            // [END distance_constraint]

            // Setting first solution heuristic.
            // [START parameters]
            RoutingSearchParameters searchParameters =
              operations_research_constraint_solver.DefaultRoutingSearchParameters();
            searchParameters.FirstSolutionStrategy =
              FirstSolutionStrategy.Types.Value.PathCheapestArc;
            // [END parameters]

            // Solve the problem.
            // [START solve]
            Assignment solution = routing.SolveWithParameters(searchParameters);
            // [END solve]

            // Print solution on console.
            // [START print_solution]
            return PrintSolution(data, routing, manager, solution);
            // [END print_solution]
        }

        private static string PrintSolution(
            in DataModel data,
            in RoutingModel routing,
            in RoutingIndexManager manager,
            in Assignment solution)
        {
            var sb = new StringBuilder();
            // Inspect solution.
            long maxRouteDistance = 0;
            for (int i = 0; i < data.VehicleNumber; ++i)
            {
                sb.AppendLine($"Route for Vehicle {i}:");
                Console.WriteLine();
                long routeDistance = 0;
                var index = routing.Start(i);
                while (routing.IsEnd(index) == false)
                {
                    sb.Append($"{manager.IndexToNode((int)index)} -> ");
                    var previousIndex = index;
                    index = solution.Value(routing.NextVar(index));
                    routeDistance += routing.GetArcCostForVehicle(previousIndex, index, 0);
                }
                sb.AppendLine($"{manager.IndexToNode((int)index)}");
                sb.AppendLine($"Distance of the route: {routeDistance}m");
                maxRouteDistance = Math.Max(routeDistance, maxRouteDistance);
            }
            sb.AppendLine($"Maximum distance of the routes: {maxRouteDistance}m");
            return sb.ToString();
        }
    }
}

Result:
Capture

I even did not add the <CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies> setting to csproj.
The google-ortools-native.dll is added to the output (bin/) directory during build automatically.

I add the project here, please can anybody confirm that this is working on your side.
WebApplication1.zip

As a next step, after we have confirmed that default netcore/netframework (also Web) projects work with OrTools 7.5, we can check which of your specific project configuration is breaking the things.

ptr1120 picture ptr1120 on 1 Feb 2020

2. Since our native google-ortools-native.dll is intended to be used by a net452 TFM should we put it in runtimes/win-x64/lib/net452/ instead of runtimes/win-x64/native. i.e. does native is not for C++ nuget package which is not exactly our case
https://github.com/google/or-tools/blob/858fa626959f7e386153af82756384b79f983b5a/ortools/dotnet/Google.OrTools.runtime.win-x64/Google.OrTools.runtime.win-x64.csproj.in#L27-L28

@Mizux:
Under the runtime folder in a NuGet package, runtime dependent libraries are added.
I believe lib folders are only for managed libraries (dotnet dll's) and all files in that folder will be referenced by the project at runtime. Whereas native folders contain non-managed (non-dotnet, e.g. c++) dependencies, which must not be referenced by the project, but needed at runtime (so must be copied to output directory).

ptr1120 picture ptr1120 on 1 Feb 2020

Hello,
Any recommendation regarding ASP.Net Framework 4.5/4.7 web projects?
Did you try to build starting with a 'clean' ASP.Net VS project and then adding ortools?

GuyBenhaim picture GuyBenhaim on 1 Feb 2020

@GuyBenhaim: I tried netframework 4.8. Did you try my attached web project? You can try creating a clean solution with any target framework you want using the described steps and tell what happens.

ptr1120 picture ptr1120 on 1 Feb 2020

the attached one works?

GuyBenhaim picture GuyBenhaim on 1 Feb 2020

Yes, as described, it works.

ptr1120 picture ptr1120 on 1 Feb 2020

Looks better that what I saw until this, but does get!
Build, and opens the browser, but gets:
Could not find a part of the path ...\WebApplication1\WebApplication1bin\roslyn\csc.exe'.

GuyBenhaim picture GuyBenhaim on 1 Feb 2020

Did you restore nuget packages and run clean build?

ptr1120 picture ptr1120 on 1 Feb 2020

Solved that one with some package update.
Now runs!
Returns a solution!

GuyBenhaim picture GuyBenhaim on 1 Feb 2020

Can I just copy my project files into that one?

GuyBenhaim picture GuyBenhaim on 1 Feb 2020

Do you have installed visual studio or rider in a current version (e.g. 2019). Do you have installed everything needed for netframework and asp.net?

ptr1120 picture ptr1120 on 1 Feb 2020

Yes, you can copy your files into that project. Please write wheather everything works after that.

ptr1120 picture ptr1120 on 1 Feb 2020

Thx.
May take some time; complex project.
Maybe I will look into your csproj and find something that helps ....

GuyBenhaim picture GuyBenhaim on 1 Feb 2020

Thanks. So summary, OrTools work as expected on Netstandard, NetCore, Netframework. Nothing broken in "Windows net452 framework" or OrTools.

The problems seem to be caused by not using the default mechanisms given by the IDE to create a project and install a Nuget package. Especially mixing things netframework/netcore, msbuild/dotnet-cli, old csproj Project format and new csproj Project format will lead to unexpected results.

ptr1120 picture ptr1120 on 1 Feb 2020
👍1

Do you believe that after installing with nuget , there could be some property in your latest csproj that would fix this?

E.g. adding lines 248-254 ?

GuyBenhaim picture GuyBenhaim on 1 Feb 2020

You should not edit the csproj file manually, especially not in a netframework project with old csproj Format, except you exactly know what you do. Use the "Manage nuget package" for (un-)installing, updating a package. Ensure that you use the old csproj format and packages.config file (which are created automatically by the IDE when you create a netframework project).

ptr1120 picture ptr1120 on 1 Feb 2020

I always used Manage Nuget Packages to install or-tools, but that ended-up with the exception.
Is there another way to use it?
Other-wise, its either 'playing' with the existing csproj, or starting with your project and re-building my project from there ...

GuyBenhaim picture GuyBenhaim on 1 Feb 2020

Interesting. Using the default mechanisms, OrTools seems to work also with a netframework Web Project.
What I did:

* Create a Asp.Net WebApplication project using VisualStudio (or Rider)

* Use netframework 4.8 as target framework

* Select MVC or WebApi as project type

* Install newest OrTools using "Manage Nuget packages"

* Set the platform target of the project to `x64`

* Add the following code to an MVC controller:

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Web;
using System.Web.Mvc;
using Google.OrTools.ConstraintSolver;

namespace WebApplication1.Controllers
{
    internal class DataModel
    {
        public long[,] DistanceMatrix = {
            {0, 548, 776, 696, 582, 274, 502, 194, 308, 194, 536, 502, 388, 354, 468, 776, 662},
            {548, 0, 684, 308, 194, 502, 730, 354, 696, 742, 1084, 594, 480, 674, 1016, 868, 1210},
            {776, 684, 0, 992, 878, 502, 274, 810, 468, 742, 400, 1278, 1164, 1130, 788, 1552, 754},
            {696, 308, 992, 0, 114, 650, 878, 502, 844, 890, 1232, 514, 628, 822, 1164, 560, 1358},
            {582, 194, 878, 114, 0, 536, 764, 388, 730, 776, 1118, 400, 514, 708, 1050, 674, 1244},
            {274, 502, 502, 650, 536, 0, 228, 308, 194, 240, 582, 776, 662, 628, 514, 1050, 708},
            {502, 730, 274, 878, 764, 228, 0, 536, 194, 468, 354, 1004, 890, 856, 514, 1278, 480},
            {194, 354, 810, 502, 388, 308, 536, 0, 342, 388, 730, 468, 354, 320, 662, 742, 856},
            {308, 696, 468, 844, 730, 194, 194, 342, 0, 274, 388, 810, 696, 662, 320, 1084, 514},
            {194, 742, 742, 890, 776, 240, 468, 388, 274, 0, 342, 536, 422, 388, 274, 810, 468},
            {536, 1084, 400, 1232, 1118, 582, 354, 730, 388, 342, 0, 878, 764, 730, 388, 1152, 354},
            {502, 594, 1278, 514, 400, 776, 1004, 468, 810, 536, 878, 0, 114, 308, 650, 274, 844},
            {388, 480, 1164, 628, 514, 662, 890, 354, 696, 422, 764, 114, 0, 194, 536, 388, 730},
            {354, 674, 1130, 822, 708, 628, 856, 320, 662, 388, 730, 308, 194, 0, 342, 422, 536},
            {468, 1016, 788, 1164, 1050, 514, 514, 662, 320, 274, 388, 650, 536, 342, 0, 764, 194},
            {776, 868, 1552, 560, 674, 1050, 1278, 742, 1084, 810, 1152, 274, 388, 422, 764, 0, 798},
            {662, 1210, 754, 1358, 1244, 708, 480, 856, 514, 468, 354, 844, 730, 536, 194, 798, 0}
        };

        public int VehicleNumber = 4;

        // [START starts_ends]
        public int[] Starts = { 1, 2, 15, 16 };

        public int[] Ends = { 0, 0, 0, 0 };
        // [END starts_ends]
    };

    public class HomeController : Controller
    {
        public ActionResult Index()
        {
            ViewBag.Title = "Home Page";
            ViewBag.Solution = Execute();

            return View();
        }

        private static string Execute()
        {
            // Instantiate the data problem.
            // [START data]
            DataModel data = new DataModel();
            // [END data]

            // Create Routing Index Manager
            // [START index_manager]
            RoutingIndexManager manager = new RoutingIndexManager(
                data.DistanceMatrix.GetLength(0),
                data.VehicleNumber,
                data.Starts,
                data.Ends);
            // [END index_manager]

            // Create Routing Model.
            // [START routing_model]
            RoutingModel routing = new RoutingModel(manager);
            // [END routing_model]

            // Create and register a transit callback.
            // [START transit_callback]
            int transitCallbackIndex = routing.RegisterTransitCallback(
              (long fromIndex, long toIndex) =>
              {
                  // Convert from routing variable Index to distance matrix NodeIndex.
                  var fromNode = manager.IndexToNode(fromIndex);
                  var toNode = manager.IndexToNode(toIndex);
                  return data.DistanceMatrix[fromNode, toNode];
              }
            );
            // [END transit_callback]

            // Define cost of each arc.
            // [START arc_cost]
            routing.SetArcCostEvaluatorOfAllVehicles(transitCallbackIndex);
            // [END arc_cost]

            // Add Distance constraint.
            // [START distance_constraint]
            routing.AddDimension(transitCallbackIndex, 0, 2000,
                                 true,  // start cumul to zero
                                 "Distance");
            RoutingDimension distanceDimension = routing.GetMutableDimension("Distance");
            distanceDimension.SetGlobalSpanCostCoefficient(100);
            // [END distance_constraint]

            // Setting first solution heuristic.
            // [START parameters]
            RoutingSearchParameters searchParameters =
              operations_research_constraint_solver.DefaultRoutingSearchParameters();
            searchParameters.FirstSolutionStrategy =
              FirstSolutionStrategy.Types.Value.PathCheapestArc;
            // [END parameters]

            // Solve the problem.
            // [START solve]
            Assignment solution = routing.SolveWithParameters(searchParameters);
            // [END solve]

            // Print solution on console.
            // [START print_solution]
            return PrintSolution(data, routing, manager, solution);
            // [END print_solution]
        }

        private static string PrintSolution(
            in DataModel data,
            in RoutingModel routing,
            in RoutingIndexManager manager,
            in Assignment solution)
        {
            var sb = new StringBuilder();
            // Inspect solution.
            long maxRouteDistance = 0;
            for (int i = 0; i < data.VehicleNumber; ++i)
            {
                sb.AppendLine($"Route for Vehicle {i}:");
                Console.WriteLine();
                long routeDistance = 0;
                var index = routing.Start(i);
                while (routing.IsEnd(index) == false)
                {
                    sb.Append($"{manager.IndexToNode((int)index)} -> ");
                    var previousIndex = index;
                    index = solution.Value(routing.NextVar(index));
                    routeDistance += routing.GetArcCostForVehicle(previousIndex, index, 0);
                }
                sb.AppendLine($"{manager.IndexToNode((int)index)}");
                sb.AppendLine($"Distance of the route: {routeDistance}m");
                maxRouteDistance = Math.Max(routeDistance, maxRouteDistance);
            }
            sb.AppendLine($"Maximum distance of the routes: {maxRouteDistance}m");
            return sb.ToString();
        }
    }
}

Result:
Capture

I even did not add the <CopyLocalLockFileAssemblies>true</CopyLocalLockFileAssemblies> setting to csproj.
The google-ortools-native.dll is added to the output (bin/) directory during build automatically.

I add the project here, please can anybody confirm that this is working on your side.
WebApplication1.zip

As a next step, after we have confirmed that default netcore/netframework (also Web) projects work with OrTools 7.5, we can check which of your specific project configuration is breaking the things.

I cannot confirm this working on .Net-Framework 4.6, which is the current runtime we use for production. If the framework version is the disqualifier I need to tell our admins to update asap.
Thx for helping

m0ddixx picture m0ddixx on 5 Feb 2020

Update: I tried the same with .Net 4.8 still no success.. Either my project nor the one attached by @ptr1120

m0ddixx picture m0ddixx on 5 Feb 2020

@m0ddixx : did you try the minimal example web project given at https://github.com/google/or-tools/issues/1862#issuecomment-581012334?

ptr1120 picture ptr1120 on 5 Feb 2020

@ptr1120 that was the one I was referring to, yes.. Unfortunately the same exception

m0ddixx picture m0ddixx on 5 Feb 2020

Enigma

GuyBenhaim picture GuyBenhaim on 5 Feb 2020

My 2 cents,

| 0x80070005 | | |
| -- | -- | -- |
| E_ACCESS_DENIED Access denied by DCOM security. | The user does not have remote access to the computer through DCOM. Typically, DCOM errors occur when connecting to a remote computer with a different operating system version. | Give the user Remote Launch and Remote Activation permissions in dcomcnfg. Right-click My Computer-> Properties Under COM Security, click "Edit Limits" for both sections. Give the user you want remote access, remote launch, and remote activation. Then go to DCOM Config, find "Windows Management Instrumentation", and give the user you want Remote Launch and Remote Activation. For more information, see Connecting Between Different Operating Systems |

src: https://docs.microsoft.com/en-us/windows/win32/wmisdk/wmi-troubleshooting?redirectedfrom=MSDN#access-denied

Mizux picture Mizux on 5 Feb 2020

@m0ddixx following questions:

  1. which exception do you experience, this one:
Unhandled Exception: System.TypeInitializationException: The type initializer for 'Google.OrTools.ConstraintSolver.operations_research_constraint_solverPINVOKE' threw an exception. ---> System.TypeInitializationException: The type initializer for 'SWIGExceptionHelper' threw an exception. ---> System.DllNotFoundException: Unable to l
oad DLL 'google-ortools-native': The specified module could not be found.
  1. same issue with the non-web project added here https://github.com/google/or-tools/issues/1862#issuecomment-580615929 ?
  2. same issue with a dotnet core project?
  3. same issue with another computer?
ptr1120 picture ptr1120 on 5 Feb 2020

Interesting @Mizux , but do you really think the error is DCOM related, since IIS won't propagate the DLLs over the network. But digging further into that error code i found out a missing visual studio c redistributable is also causing that error code (according to stackoverflow).
I can confirm on my machine there is no visual c dependency or visual studio workload.
I need to get it installed by an admin so the best I can do is report my findings by tomorrow

m0ddixx picture m0ddixx on 5 Feb 2020

Also the E_ACCESS_DENIED Flag has HRESULT: 0x80070005 while the DllNotFoundException (mentioned here) has HRESULT: 0x8007007. So there were basically two different causes.

m0ddixx picture m0ddixx on 5 Feb 2020

According to the docs
you build the binaries using .Net Core SDK 2.1.302 at least and the ms docs say you need Microsoft Visual C++ 2015 Redistributable Update 3 to run the sdk. And to run the compiled binaries you need the exact same runtime. Coincidentally this package is missing on my machine so I will try to get it installed by tomorrow.

m0ddixx picture m0ddixx on 5 Feb 2020

The c++ library is built with vs2019

Le mer. 5 févr. 2020 à 17:53, Nico Kranz notifications@github.com a
écrit :

According to the docs
https://github.com/google/or-tools/tree/stable/ortools/dotnet#pre-requisites
you build the binaries using .Net Core SDK 2.1.302 at least and the ms
docs say you need Microsoft Visual C++ 2015 Redistributable Update 3
https://docs.microsoft.com/en-us/dotnet/core/install/dependencies?tabs=netcore21&pivots=os-windows
to run the sdk. And to run the compiled binaries you need the exact same
runtime. Coincidentally this package is missing on my machine so I will try
to get it installed by tomorrow.

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lperron picture lperron on 5 Feb 2020

@GuyBenhaim is there any difference if you switch Enable SSL to true in the project?
I assume you're still running it in IIS Express in a development environment.

m0ddixx picture m0ddixx on 5 Feb 2020

Running in Local IIS (i.e. not in express).
Where exactly should I set SSL to Enabled?

GuyBenhaim picture GuyBenhaim on 5 Feb 2020

Running in Local IIS (i.e. not in express).
Where exactly should I set SSL to Enabled?

Highlight the project in the solution explorer and below the solution explorer there is a property window. There you will find the SSL setting.

m0ddixx picture m0ddixx on 5 Feb 2020

BTW: installing the latest Visual C++ redistributable for 2019 fixes the HRESULT: 0x8007007 error.
I think you should update your docs because in these docs the requirement between visual studio 2017 or 2019 is vaguely described. Having just vs2017 installed only has the 2017 redistributable shipped. I also wonder why the nuget package is not mentioned in the docs because they seem more convenient to me than including the bare binary packages. Hope that helped some facing issues.

m0ddixx picture m0ddixx on 7 Feb 2020

Nico Kranz,
I've build your project (WebApplication1.zip) with Local IIS, and it crashes with the same HRESULT exception when calling the index manager.

I then built my project with IIS Express and it does not case this exception (still not fully running but for other reasons).

So the issue seems to be with the WebServer ....

GuyBenhaim picture GuyBenhaim on 8 Feb 2020

Next, I rebuilt a WebAPI VS project from scratch (VS2017, ORT 7.4 .NetF 4.7.2 ) and only then added my code and packages.
When building/running the Web project via Local-IIS I got exceptions immediately when the main web-page opens in IIS , before even accessing or-tools :
FileLoadException: HRESULT: 0x80131045)
ConfigurationErrorsException:
HttpException (0x80004005)

Correction: This refers to 7.4 as installation of 7.5 failed and NuGet removed the packages and reported failure.

GuyBenhaim picture GuyBenhaim on 9 Feb 2020

Also built/ran with IIS express, same:
Could not load file or assembly 'Google.OrTools' or one of its dependencies. Strong name signature could not be verified. The assembly may have been tampered with, or it was delay signed but not fully signed with the correct private key. (Exception from HRESULT: 0x80131045)

Repeated with ORT 7.4 and .Net 4.8 > same.

GuyBenhaim picture GuyBenhaim on 9 Feb 2020

@GuyBenhaim concerning the strong name signature, AFAIK it has been fixed for the v7.5 IIRC see https://github.com/google/or-tools/issues/1421#issuecomment-555238081

Mizux picture Mizux on 10 Feb 2020

Thx @Mizux

Regrettably v7.5 refuses to install and I used v7.4. (I have downloaded the C++ re-dist) and I cannot check this fix for 7.5

See below the output when installing 7.5 which installs and then removes it (see in bold).

Attempting to gather dependency information for package 'Google.OrTools.7.5.7466' with respect to project 'AandRScratch', targeting '.NETFramework,Version=v4.8'
Gathering dependency information took 4.45 sec
Attempting to resolve dependencies for package 'Google.OrTools.7.5.7466' with DependencyBehavior 'Lowest'
Resolving dependency information took 0 ms
Resolving actions to install package 'Google.OrTools.7.5.7466'
Resolved actions to install package 'Google.OrTools.7.5.7466'
Retrieving package 'Google.OrTools 7.5.7466' from 'nuget.org'.
Retrieving package 'Google.OrTools.runtime.linux-x64 7.5.7466' from 'nuget.org'.
Retrieving package 'Google.OrTools.runtime.osx-x64 7.5.7466' from 'nuget.org'.
Retrieving package 'Google.OrTools.runtime.win-x64 7.5.7466' from 'nuget.org'.
Retrieving package 'Google.Protobuf 3.11.2' from 'nuget.org'.
Retrieving package 'System.Buffers 4.4.0' from 'nuget.org'.
Retrieving package 'System.Memory 4.5.2' from 'nuget.org'.
Retrieving package 'System.Numerics.Vectors 4.4.0' from 'nuget.org'.
Retrieving package 'System.Runtime.CompilerServices.Unsafe 4.5.2' from 'nuget.org'.
Removed package 'Google.Protobuf.3.10.0' from 'packages.config'
Successfully uninstalled 'Google.Protobuf.3.10.0' from AandRScratch
Adding package 'Google.OrTools.runtime.linux-x64.7.5.7466' to folder 'C:\Users\guy\Google Drive\Routes\Projects\Proto\Allocation\AandRScratch\packages'
Added package 'Google.OrTools.runtime.linux-x64.7.5.7466' to folder 'C:\AandRScratch\packages'
Added package 'Google.OrTools.runtime.linux-x64.7.5.7466' to 'packages.config'
Successfully installed 'Google.OrTools.runtime.linux-x64 7.5.7466' to AandRScratch
Adding package 'Google.OrTools.runtime.osx-x64.7.5.7466' to folder 'C:\AandRScratch\packages'
Added package 'Google.OrTools.runtime.osx-x64.7.5.7466' to folder 'C:\AandRScratch\packages'
Overwriting existing file 'orLogo.png'..
Added package 'Google.OrTools.runtime.osx-x64.7.5.7466' to 'packages.config'
Successfully installed 'Google.OrTools.runtime.osx-x64 7.5.7466' to AandRScratch
Adding package 'Google.OrTools.runtime.win-x64.7.5.7466' to folder 'C:\AandRScratch\packages'
Added package 'Google.OrTools.runtime.win-x64.7.5.7466' to folder 'C:\AandRScratch\packages'
Install failed. Rolling back...
Package 'Google.OrTools.runtime.win-x64.7.5.7466' does not exist in project 'AandRScratch'
Removed package 'Google.OrTools.runtime.osx-x64.7.5.7466' from 'packages.config'
Removed package 'Google.OrTools.runtime.linux-x64.7.5.7466' from 'packages.config'
Package 'Google.Protobuf.3.10.0' already exists in folder 'C:\AandRScratch\packages'
Added package 'Google.Protobuf.3.10.0' to 'packages.config'
Removing package 'Google.OrTools.runtime.win-x64.7.5.7466' from folder 'C:\AandRScratch\packages'
Removed package 'Google.OrTools.runtime.win-x64.7.5.7466' from folder 'C:\AandRScratch\packages'
Removing package 'Google.OrTools.runtime.osx-x64.7.5.7466' from folder 'C:\AandRScratch\packages'
Removed package 'Google.OrTools.runtime.osx-x64.7.5.7466' from folder 'C:\AandRScratch\packages'
Removing package 'Google.OrTools.runtime.linux-x64.7.5.7466' from folder 'C:\AandRScratch\packages'
Removed package 'Google.OrTools.runtime.linux-x64.7.5.7466' from folder 'C:\AandRScratch\packages'
Executing nuget actions took 38.03 sec
Failed to add reference to 'google-ortools-native'.
Please make sure that the file is accessible, and that it is a valid assembly or COM component.
Time Elapsed: 00:00:43.6456412

GuyBenhaim picture GuyBenhaim on 10 Feb 2020

I found some time for this, resolved the v7.5 install (cleaned/deleted .nuget cache) and built the Web project from scratch. Running/Debug on IIS Express works!

But I'm still getting "cannot load DLL" exception when running/debug on Local IIS immediately when the code accesses RoutingIndexManager manager = new RoutingIndexManager(...);
Access is denied (exception from HRESULT: 0x80070005 (E_ACCESSDENIED))
I copied the native.dll (old tip by MIZUX) to /bin and to /lib, but still getting the exception.

Any tips?

GuyBenhaim picture GuyBenhaim on 14 Feb 2020

Ok, just a Windows-Security access permission issue.

GuyBenhaim picture GuyBenhaim on 14 Feb 2020

Hi,
I get the same problem on Windows 10, and i fixed it by the following 👍

  1. Update the windows 10 version to the latest (1903)
  2. Install Visual Studio 2019 the last version (Instead of 2017)
  3. Install the latest supported Visual C++ (this last action was the most important)

Regards,

moussabderrahim picture moussabderrahim on 14 Feb 2020

Is this going to be resolved in 7.6 or a patch?
Thx

GuyBenhaim picture GuyBenhaim on 14 Apr 2020
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