Spyder: In fresh Anaconda installation, Spyder does not start and reports Assertion failed: error not defined [0] (C:\ci\zeromq_1549025594292\work\src\err.cpp:383)

[fnielsen]

Issue Report Checklist

• [ x] Searched the issues page for similar reports
• [x] Read the relevant sections of the Spyder Troubleshooting Guide and followed its advice
• [x] Reproduced the issue after updating with conda update spyder (or pip, if not using Anaconda)
• [ ] Could not reproduce inside jupyter qtconsole (if console-related)
• [x] Tried basic troubleshooting (if a bug/error)
  
  
  
  • [x] Restarted Spyder
  
  
  • [x] Reset preferences with spyder --reset
  
  
  • [x] Reinstalled the latest version of Anaconda
  
  
  • [x] Tried the other applicable steps from the Troubleshooting Guide
  
  
• [x] Completed the Problem Description, Steps to Reproduce and Version sections below

Problem Description

Anaconda's Spyder will not start

What steps reproduce the problem?

A

1. Start Spyder by pressing the spyder appication button in the interface

B

1. Start Spyder from cmd.

What is the expected output? What do you see instead?

Spyder starts

Paste Traceback/Error Below (if applicable)

A. Nothing

B. Assertion failed: error not defined [0] (C:\ci\zeromq_1549025594292\work\src\err.cpp:383)

No traceback.

Versions

• The most recent Anaconda version
• Spyder version:
• Python version: 3.7
• Qt version:
• PyQt version:
• Operating System name/version: Windows.

IronPython was also installed on the computer.

Dependencies

PASTE DEPENDENCIES HERE

[ccordoba12]

This is most probably an issue with your firewall or antivirus, so not directly a Spyder problem. Please deactivate them and try again.

If that fails, I don't have more advices to give you, sorry.

[mradultiw]

If you are using any proxy app like proxifier, than close it first and than try again, it'll work. I was also having exactly same issue.