I want to precise.
My Thektronix Phaser 860N have no duplex unit.
The problem exist when I send two copy of the same document (on two different pages).
I have check the error message and are these:
15:22,721,05:81836
14,22,703,05:81636
13:22,700,02:81636
12:22,700,02:81636
Some times after...