> For the complete documentation index, see [llms.txt](https://docs.besmart.software/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://docs.besmart.software/getting-started/troubleshooting/fatal-error-occurred.md).

# Fatal Error Occurred

## Problem

A 'fatal error' message visible, similar to: 

![](/files/m97zBv2Pv5EfMUbqpmLP)

## **Solution**

1. Disable other Revit® add-ins and re-start Revit®. \
   If this fixes the issue - try and re-enable each of the add-ins one by one. \
   Once the issue re-occurs, [forward us](https://agacad.freshdesk.com/support/tickets/new) the name of the software that caused the crash.\
   We will test compatibility and make adjustments if needed. 
2. If you suspect that ARKANCE software is causing Revit® to crash, please [forward us](https://agacad.freshdesk.com/support/tickets/new) your ARKANCE Dock and Revit log files for investigation. Log files can be found here:
   * Dock: C:\Users\\%username%\AppData\Roaming\TOOLS 4 BIM\\\*Revit version\*\\**LogT4BDock.txt**
   * Revit: C:\Users\\%username%\AppData\Local\Autodesk\Revit\Autodesk Revit \*Revit version\*\\**Journal.xxxx.txt**


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