Michael,
I don’t think that is a NAK (That would be a message actually returned not a PDL error).
My best guess is the receiving system is out of memory.
Again with the ‘noise’ level turned up, more intelligence can be garnered.
Jim Kosloskey
email: jim.kosloskey@jim-kosloskey.com 30+ years Cloverleaf, 60 years IT – old fart.