Parameter name: symbol, value cannot be null

Revit API
1

Hey,

I have some code to create sheets and add views and annotations.
It works fine in the other revit versions.
But for some reason i get an error in revit 2024.
Thats totally fine, I can troubleshoot those problems and edit the script.
The thing that i am concerned about is that i get Fatal errors when I get a pyrevit error message.
The message below was combined with the fatal error. I’ve never had one in the other versions and i create a lot of scripts. The Traceback messages have never caused a fatal error.
I have to say that most of my scripts do work in Revit 24

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2

  1. If you don’t share nay of the problematic code, very little chance someone gets to the task of helping.

  2. Define fatal error: blue screen, Revit crash, Revit soft crash asking you to save, pyRevit output window only?

  3. The error is pretty explicit. And ‘symbol’ can’t be a parameter in the Revit API, so maybe there is a typo somewhere

1 Like
3

Hey,
I can fix the code and i just did. So thats okey.
My problem is that revit had a crash, i’ve never had that happen before while running a script in revit versions below 2024.
I tried the faulty script a few times and every time the same crash.
My real question is: am i just lucky ive never had revit crash from a script before or is it a thing that happens in R24.
The revit gave a message for Fatal error and asks me to save before closing

4

So soft crash.

The journal file might tell you more

5

I will look in to it,
I just simulated a few other different python tracebacks and none of them crashed revit.
So it seems to be an isolated incident to that one script.
Thanks!