Hi,

I am trying to access Excel from .NET. Initially it was working fine. But
after sometime it is giving the exception, 'System.InvalidCastException:
QueryInterface for interface Microsoft.Office.Interop.Excel._Application
failed'. I tried reinstalling PIAs and Excel, but nothing worked.

I installed PIA's in the GAC.
I am using Excel 2002 SP-2 and VS 2003.

Thanks for your help.

-Samba