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.NET Forum / .NET Framework / Interop / July 2004Help with PIA's and Office 2000
I wrote an app that transferred data from Excel to Access (Office 2000 on XP Professional). I had it in release form and it was working fine. I installed PIA's to develop another App and now I get an error on the first App informing me of an unhandled Exception of the type "System.InvalidCastException" in the line where the Excel application is created. I've deleted the PIA's according to MS's instructions however I'm still getting the error. I need to somehow correct the system so it can run the first App. Is there something else that the PIA install program does? Once PIA's are installed, is Visual Studio prevented from creating interop assemblies for Office 2000? > I wrote an app that transferred data from Excel to Access (Office 2000 on XP > Professional). [quoted text clipped - 12 lines] > Studio prevented > from creating interop assemblies for Office 2000? =========================================== Was "first app" using the Office XP PIAs? If it was, why would you (re)install the Microsoft's PIAs for "second app"? Or did you uninstall the XP PIAs and install the Office 2003 PIAs for "second app"? What MS instructions for deleting the PIAs were you using? If the PIAs were "uninstalled", did you verify that they no longer exist in the GAC? If they were really uninstalled, NEITHER app should work because the assemblies couldn't be found. The PIAs ARE the relevant Interop assembly in this case. Why are you asking if "VS.Net is prevented from creating interop assemblies..." when you should be using (and your project should be referencing) the MS PIAs in the GAC? Try using fuslogvw.exe (or debugging) to determine the location that the PIA is loaded from - if you uninstalled, it shouldn't BE loaded, and if it IS loaded, fuslogvw will give you the info on location and version.
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