Airsim: Building Blocks Environment in Windows, UE 4.18

[v-prgmr]

Platform: Windows 7
Visual Studio: 2017
Unreal Editor: 4.18

Problem: build.cmd gives a sucessful build but doesnt generate the .sln under the Unreal\Environment\Blocks directory.

When generate_from_git.bat is run, the following error pops up. (Also when the Blocks.uproject file is right click and "Generate Project Files" is chosen)

Error message in the pop-up
" Running C:/Program Files/Epic Games/UE_4.18/Engine/Binaries/DotNET/UnrealBuildTool.exe -projectfiles -project="C:/AirSim-master/Unreal/Environments/Blocks/Blocks.uproject" -game -rocket -progress -log="C:AirSim-master\Unreal\Environments\Blocks/Saved/Logs/UnrealVersionSelector-2019.04.17-15.41.31.log"
Discovering modules, targets and source code for project...
While compiling C:AirSim-master\Unreal\Environments\Blocks\Intermediate\Build\BuildRules\BlocksModuleRules.dll:
ERROR: c:AirSim-master\Unreal\Environments\Blocks\PluginsAirSim\SourceAirSim.Build.cs(50,17) : error CS0103: The name 'PublicDefinitions' does not exist in the current context
ERROR: c:AirSim-master\Unreal\Environments\Blocks\PluginsAirSim\SourceAirSim.Build.cs(51,17) : error CS0103: The name 'PublicDefinitions' does not exist in the current context
ERROR: c:AirSim-master\Unreal\Environments\Blocks\PluginsAirSim\SourceAirSim.Build.cs(55,17) : error CS0103: The name 'PublicDefinitions' does not exist in the current context
ERROR: c:AirSim-master\Unreal\Environments\Blocks\PluginsAirSim\SourceAirSim.Build.cs(61,17) : error CS0103: The name 'PublicDefinitions' does not exist in the current context
ERROR: c:AirSim-master\Unreal\Environments\Blocks\PluginsAirSim\SourceAirSim.Build.cs(83,9) : error CS0103: The name 'PublicDefinitions' does not exist in the current context
ERROR: c:AirSim-master\Unreal\Environments\Blocks\PluginsAirSim\SourceAirSim.Build.cs(84,9) : error CS0103: The name 'PublicDefinitions' does not exist in the current context
ERROR: c:AirSim-master\Unreal\Environments\Blocks\PluginsAirSim\SourceAirSim.Build.cs(85,9) : error CS0103: The name 'PublicDefinitions' does not exist in the current context
ERROR: c:AirSim-master\Unreal\Environments\Blocks\PluginsAirSim\SourceAirSim.Build.cs(154,9) : error CS0103: The name 'PublicDefinitions' does not exist in the current context
ERROR: UnrealBuildTool Exception: Unable to compile source files. "

[msb336]

There are a couple things you can do to troubleshoot:

1. Generate project files from inside unreal
   
   
   
   • open Blocks.uproject in the unreal editor
   
   
   • In the editor File -> Refresh Visual Studio Project
   
   
2. Reset AirSim plugin
   
   
   
   • Delete Intermediate, Binaries, and Plugins\AirSim folders in the project directory
   
   
   • Copy Unreal\Plugins\AirSim to the blocks project plugins folder
   
   
   • Generate the VS solution using the steps in part 1
   
   
3. Clean out the repository and rebuild
   
   
   
   • This will remove any files that are not versioned in your repo, so make sure to commit your work before doing this!
   
   
   • run git clean -fdx from the command line
   
   
   • Rebuild airsim, and add the AirSim Plugin folder back to the Blocks environment
   
   

[v-prgmr]

@msb336 I tried the steps you listed. Unfortunately nothing helped.
Thank You

[msb336]

@vishal-prgmr It appears this is from the most recent PR to be merged, which feature some definition changes to allow airsim to work with versions 4.19+.

For an immediate solution, you can roll back to the previous commit to the repo:
git checkout c494e2c15ec6f363a60a7ca6b6640f3394f528e2

@sytelus there is a new pr which fixes this issue, please merge it when you can.

[CurryTang]

@vishal-prgmr I've encountered the same problem. It seems that it's related to the updates of some API of Unreal Build Tools. You can check https://forums.unrealengine.com/development-discussion/c-gameplay-programming/1527721-error-cs0103-the-name-publicdefinitions-does-not-exist-in-the-current-context

[msb336]

@CurryTang you are correct. this pr should remedy the issue. Please update your master branch and try building the blocks project again.

[v-prgmr]

@msb336 , I will get back after trying this out. Thank you so much.

[v-prgmr]

@msb336 , Got it working. Thank You.