Error - NonComVisible Base Class
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Hi, does anyone know what this error means and how I can resolve the issue? I have created a UFL for crystal reports in VS2005 and have created the assembly etc. It works fine in preview report, but when I load the program and try to load the report from the viewer it gives me the error: "NonComVisibleBaseClass was detected Message: A QueryInterface call was made requesting the default IDispatch interface of COM visible managed class 'CRUFL_VB_ReportFunctions.CrystalReport1'. However since this class does not have an explicit default interface and derives from non COM visible class 'CrystalDecisions.CrystalReports.Engine.ReportClass', the QueryInterface call will fail. This is done to prevent the non COM visible base class from being constrained by the COM versioning rules." I have done some research online to find that the problem might be the MDA, I added the MDA key as described and set it to 0 but am still having problems with mda issues during the build and run within visual studio. Runs fine if I use the exe in the bin folder. Any ideas? thank you
eatwork