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In my Datamart, when attempting to 'Load Data', I receive the error "An internal error happened due to failed runtime assertion: Parameter 'transactionId' is not expected to be null' HttpStatusCode 500.
I'm guessing a null value is discovered in a table / query I'm transforming. None of my tables have 'transactionId' as a field. I can't for the life of me find which Table / Query where this is happening. Please help. image below
This sounds more like an issue on the Datamart side (note the 500 error message). Do you get the same issue when you use a dataflow?