COM+ component calling other COM+ components - “Cannot load type”

Question

I have a two .NET assemblies which are registered as COM+ components and I\'m testing them from a regular console application test harness;

Dim objFirst As N         


        

Answer 1

I have finally found a solution to the problem described above. I'm answering the question myself here to save anyone else the pain that I went through trying to get this to work.

• Go to Component Services > COM+ Applications > YourComApplication

• Bring up the properties window for YourComApplication and go to the Activation tab.

• Under "Application Root Directory", supply the path in which your DLLs reside.

• Create an "application.manifest" file for your COM+ application and put it in the same directory as above. A sample file looks like this;

• This final step is what I had missed before and this solution will not work without it.

Also, make sure that you have a separate directory for each of your COM+ applications. This approach will allow you to have mulitple COM+ applications based on .NET assemblies calling each other without anything having to be in the GAC.