I had a tech complain that one of our NDPS printers was showing as "not
bound" in NDPS Manager. I tried shutting it down & restarting it,
tinkered with the load command, even deleted and recreated the printer.
Nothing worked -- it continued to say "not bound."

I looked at the server console and saw "NDPSJPMComm failed with error
-713, opcode: 101" repeated dozens of times. Then I noticed that the
server was running a TSM backup. I exited the backup client and the
printer loaded fine.

Dunno if this will help anyone else, but for what it's worth...