NW6SP4 has been applied to two more servers in the cluster, without incident. One more server remains before the whole thing is patched. On the plus side, possibly a really big plus, NDPSM hasn't bombed out on the student side since we patched. We had been getting abends on CPU HOGS relating to interupts not returning correctly while execution is in NDPSM's SNMP polling process. Oh, I hope this has cleared up that particular abend problem. Oh, I hope.