Revit cannot run the external application 'Plugin Name'

[RomeoMacapobre]

We've encountered this issue of (Revit cannot run the external application 'Plugin Name') when running multiple instances of Revit 2023 with our custom plugin installed.  The problem goes away if there is just one instance of Revit 2023 running.

Any ideas how to resolve this issue?

We have an add in manifest defined under

• C:\ProgramData\Autodesk\Revit\Addins{{RelYear}}\

[moturi.magati.george]

Hi @RomeoMacapobre,

I would suggest trying to start Revit in the debugger with your problematic add-in loaded. If it crashes, good, you know that your add-in is causing it.

Once that is established, back off again. Remove all your add-in code. Ensure no crash.

Add code back again line by line, and debug step by step until the crash reappears.

[naveen.kumar.t]

Hi @RomeoMacapobre ,

Need some more information to analyze the issue.

Please do your best to isolate the problem and send a small, non-confidential buildable sample project with a test drawing that demonstrates the behavior. Also, please provide detailed instructions on how to reproduce the behavior.

Note:

1.         Do not send us any information that you consider to be a trade secret to your company.

2.         Code snippets will not help us, because they don't allow us to reproduce the context in which the code runs.