I am aware of this...this is what the reject explains.  There is a smartbox above line 2 with an "explain" button that you click on to put an explanation.  That creates an attachment to the return.  I have done this all filing season but now...at the 11th hour of the last deadline, Proseries has some sort of glitch and it is bumping the return.  NOONE at Proseries is able to help and they won't escalate the issue.  THe only way to attach a pdf to the 1116 is for the Schedule B.