I think you need to preallocate blob space for the retrieval. But before you go down that path, heed the other's advice. The datawindow already supports what you are trying to do and you REALLY NEED a good reason to attempt to handle this using dynamic sql. You will notice that PB has no built-in datatype (outside of the datawindow) to handle rowversion values. This is a clue that it will be difficult to use. If you must continue down this path, I suggest you simply cast it to bigint during retrieval and use bigint as the update procedure argument. This is ugly and a kludge but it makes things easier in PB.
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