CATIA Macro error

[elmundo777]

There is a program written in vb.net. For several users, everything works fine. Several users get an error while working:

"System.ArgumentNullException: Value cannot be null.
Parameter name: type"

There are no references to a line of code.

It feels like the program cannot establish a connection with Catia.
Has anyone encountered such an error? How to solve it?

 

[Little Cthulhu]

The error is too common.

Search for CreateInstance calls.
Rebuild application with debug info to see line reference.