I'm developing a desicion tree algorithm (CHAID) to be integrated as a plugin in SQL Server 2008 Analysis Services. It is almost done. The only thing that's missing in my implementation is the capability of testing the algorithm accuracy using any of the Mining Accuracy Chart.
When I try to use these features, in my Visual Studio Business Intelligence Project, I get this error message:
Query execution Failed
An unexpected exception occurred. COM error: COM error: DMPluginWrapper; Object reference not set to an instance of an object.. (Microsoft OLE DB Provider for Analysis Services 2008.)
I think I'm not properly overriding a method or something like that. Since I have no documentation and no examples available, I'm not being able of detect where is the problem.
Maybe some of you have experience developing plugin algorithms for SQL Server and have a clue of what I'm missing.
I know It's hard to help without seeing any piece of the source, but there're a bunch of files in the project. I've been reading and reading my source and I still don't know where the actual problem is.
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