When running a Project or Portfolio report that reads plans from a Microsoft Project (MSP 2007) .mpp file you get the message:
There is a problem reading the MSP Plan 'my name.mpp'
Call was rejected by callee.
(Exception from HRESULT: 0x80010001 (RPC_E_CALL_REJECTED)) (clsProjectReport.ReadUserSpecifiedMspOnClient)
If you have a copy of Microsoft Project 2007 open on your PC, close it and run the report again.