mscorwks.dll causing error when closing Visio with C# addin

[Thomas Klaus]

Hi there,

I'm developing a C# addin for Visio implementing the IDTExtensibility2
interface. Now occasionally Visio crashes when closing with the
appropriate error message:

Faulting application visio.exe, version 11.0.5509.0, faulting module
mscorwks.dll, version 1.1.4322.2032, fault address 0x00071bd8.

This error only appears occasionally and it's nearly impossible to
reproduce.

Does anyone have any suggestions? Is there a way to get some more
information? Are there any known issues about this?

Thanks in advance,
Thomas Klaus