On 2013-04-21 06:12, Bob Armstrong wrote: I can t figure this one out I load RSX11M+ from tapes and do a SYSGEN. All goes perfectly. But then if I do a SYSGEN again (say, because I want to change something in the first configuration) several drivers fail to link. Looking at the map file for one, say DLDRV, shows Undefined references: $BLKC2 $BMSET $CVLBN $MPUBM $RLCN $RQCND $STMAP $VOLVD They look like system service calls to me, but the second SYSGEN was done with the same executive options as the first. In fact, I used the saved answer file for that part of the SYSGEN all I did the second time around was to change the peripheral configuration part. Is there something I m supposed to do to clean up or re-initialize after the first sysgen? No. No cleaning up or re-initialization is required. Yes, the symbols are defined in the kernel. I'm not sure why they fail to resolve. I've never seen, heard or had this problem. Could you send the command file that sysgen creates that task builds the driver? Johnny -- Johnny Billquist || "I'm on a bus || on a psychedelic trip email: bqt at softjar.se || Reading murder books pdp is alive! || tryin' to stay hip" - B. Idol