Im not familiar with VA, but in theres a list when you attach a file, that lets you pick the "type" of attachment, are you sure youre choosing the correct type so that it recognizes it?
FYI - ProSeries generates the 760C as part of the VA return. So it's not the 760 that is not being attached. It appears to be some other problem like the one I posted. In my case, ProSeries wants a supporting statement attached as a PDF. I attached it and ProSeries is still slinging off the error message. I'm going to disable error checking and move on.
