Possible reasons of The server threw an exception. (Exception from HRESULT: 0x80010105 (RPC_E_SERVERFAULT))

I have written customized automation application based on automation API of CAD software in VB.net. I am writing log file from VB code. My customized application is failing on specific machine(client machine). I have added detailed log to track the root cause. I found an API after which application throws The server threw an exception. (Exception from HRESULT: 0x80010105 (RPC_E_SERVERFAULT)) error. How can I trace the root cause of failure ?

NOTE: 1. Multi-threaded application. 2. Interop dlls