ATL COM Server - creating COM object defined in ATL Server from this server

Question

I have created an ATL COM Server C++ project using a Visual Studio 2005 wizard. I added a new COM class using the ATL Simple Object wizard. Now when I try to create this COM class instance from my server (calling CoCreateInstance within the ATL server) I get CO_E_SERVER_EXEC_FAILURE error from CoCreateInstance. When I try to create this object from another project (another Win32 executable), the object gets created correctly. What causes this error?

Answer 1

There's an excellent blog post available here that discusses the reasons you can get this HRESULT.