Attsch which pdf files?

I have a client which is a Maryland resident whom works in NJ.  My client pays taxes to NJ and therefore files a Maryland 502CR.  Maryland requires a (PDF attachment) copy of the NJ Non-Resident tax return.  I have attached the a pdf file and I am still receiving an error message.  Can someone assist?  

I am having the same problem with a MD resident return with income in VA.  Did not have this problem on a different return last month.  

The problem still exists!!  I keep attaching the requested K-1 and copy of the VA return and still the e-file bombs.  I need this filed tonight!!  Never had this issue before.