I am doing an amended Form 1065 in ProSeries.  Instructions say to prepare and attach a PDF document to the return to explain changes, etc.  When I do this I get the following fatal error:  "submission contains a form or schedule which MeF is not accepting as a binary attachment."  If I don't make the attachment, I don't get an error, but then I haven't given an explanation for the changes, either.  Any thoughts?