Nigel™ AI Crashing When I Open It From LabVIEW™ or TestStand™

Updated Mar 27, 2026

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.

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 AI to crash when opened. This is a known issue and will be fixed in a later release.