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In the OlapClient control, we are using the data provider object of type AdomdDataProvider by default and also provide support to use custom data provider. Everything will be working as expected when using the AdomdDataProvider. But when user try to use custom data provider for OlapClient control, exceptions are thrown and it results in application crash. For example, if user tried to drag and drop any measure or dimension into some other axis, it throws an exception since data provider is NULL.