Excel .NET COM - Automation error. The system cannot find the file specified

Question

I have a .NET 2.0 COM object that\'s used by VBA in Excel. It works fine on my dev machine, but when trying to use it on a clean VM workstation I get this error:

Automat

Answer 1

I received this "Automation error. The system cannot find the file specified" error after I had created a .NET .dll (v4.0) with the intention of using it in a VB6 application (decorated my class with "ClassInterface" and "ComVisible" attributes, methods with "ComVisible").

I ran "regasm.exe -tlb C:\PathTo\MyDll.dll" but received the above error after adding the .tlb file as a reference in my VB6 application and running/debugging it. Only after adding the "-codebase" parameter to the regasm.exe call and re-adding the .tlb reference did the error get resolved.

Just thought I'd share my experience.