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backgroundworker exception

I have a com object developed with the Intel compler for Fortran that performs a long running process. I have succeeded in starting this proces in a seperate thread from the UI but I cannot get a callback from it. I can have it write to a global variable with a result but I would need a timer on a form to keep checking for this result. I would prefer a more elegant solution. I tried using the backgroundworker class and the code compiles and runs but I receive this exception after the com object is created at the first reference to any of the objects properties:

Unable to cast COM object of type 'PSAx_ComLib.PSAxComClass' to interface type 'PSAx_ComLib.IPSAxCom'. This operation failed because the QueryInterface call on the COM component for the interface with IID '{0C394B43-839B-4143-B876-8EE16EA36CF5}' failed due to the following error: No such interface supported (Exception from HRESULT: 0x80004002 (E_NOINTERFACE)).

This same code runs fine if I do not try to use a delegate or run as a doWork of a backgroundworker.

Any clues would be appreciated

TIA

 

 

1 Answer Found

 

Answer 1

I forgot to mention that the com  object is exposed to my VS 2005 project using interop. So, we have a Visual Studio 2005 solution  which includes the Intel fortran  compiled com object.
 
 
 

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