Well waddya now...I was writing away about this sync lockup and the mk2 has cleared the error itself. I can't be any more specific than that, I looked over at the RIO and the locked "synchronizing" display had disappeared. I was writing on the BBS on a second monitor (win2000 multi system) and emplode unfroze as well. This event from start/finish took about 25 min. Sooo...maybe interface (10bT) stack timeout in IF module or ICMP issue, idunno? Wish I'd netstat'ed the RIO during the lockup.

Keil