How Do I Stop Nigel Crashing When I Open It From LabVIEW or Teststand?

Updated Aug 21, 2025

Reported In

Software

  • LabVIEW
  • TestStand
  • Nigel Local Service Plug-In 2025 Q3

Issue Details

When attempting to open Nigel AI from LabVIEW, or TestStand, it crashes. How do I resolved this issue?

Solution

Delete the file server_url.txt located in the folder C: \Users\<User Name>\AppData\Local\National Instruments\LabVIEW 2025 x64\LabVIEW Nigel Chat Application.

Additional Information

The file server_url.txt should be deleted automatically when it is no longer needed. If the file is not deleted, then it will cause Nigel to crash when opened. This is a known issue and will be fixed in a later release. 

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