"C:\\exports\\" + (DT_WSTR,50)DocumentID + ".doc"

The above statement generates and error since there is no DocumentID in the [Production].[Document] table.

How do I go around this. I am learning SSIS and I need to work through these steps.

Having only just gotten to this chapter myself, and in case anyone ever comes across this issue again I though I should include a little input. As aojiku01 points out, DocumentID does not exist so I got around the error using the expression below instead:

Many Thanks
locus2k1