We use to get these all the time some time, 3 or 4 a day. At first DEC support sent us several lat patches. But the one routine that ended up fixing it was init_sysent.o. Output of what: init_sysent.o init_sysent.c 9.1BLD (ULTRIX) 11/4/88 Since we installed this we haven't had any problems. Just for the curious we have an 8820 with Ultrix 3.1. /cal