R – managed client of a COM server threw InvalidCastException

In VS - project properties - in the Build tab - platform target =X86

This was a problem with registration and the fact that regasm only execute if the assembly has the same target as regasm. There should be a "/com_oop or something" parameter for regasm to make it register LocalServer32 instead of InprocServer32 and register it for both 32 and 64bit on 64bit systems.

To get around this I had to temporarily compile the executable (with the same path) to 32bit, run the 32bit regasm (with /tlb:..), then compile back to 64bit, run 64bit regasm (with /tlb:.. again), and now it works properly for both 32 and 64bit against the 64bit executable.

CSExeComServer has a register and unregister method where it manually delete the InprocServer32 key and adds a LocalServer32. To make sure this works properly I'm going to change this one, detect if it's registering on a 64bit system, and then have it register this properly there. I'll post the changes I did to the register method when I'm done.