I am trying to debug a SSIS package, and am seeing some new and mystifying behavior in BIDS that wasn't there before.
I have an Excel Data Source, which I have pointed to a file on my hard drive. In addition to the columns I expect to see, in my Excel Data Source, there is an additional column, "F28", in the list of Available External columns. There is no such column in the Excel file. I even opened the excel file in Notepad and did a ctrl-F search for "F28". Nowhere in the file does "F28" exist.
How can this be? I'm stumped on even how to proceed to investigate this further.
-Tab Alleman