We recently updated our NW65 servers to SP4. Everything has been running smoothly, with one exception. On one of our servers during it's nightly backup it starts the backup process and then at some random time during the backup the server will abend and reboot. The abend log looks like:

************************************************** *******
Novell Open Enterprise Server, NetWare 6.5
PVER: 6.50.04

Server STAFF halted Tuesday, September 20, 2005 11:16:53.697 pm
Abend 1 on P00: Server-5.70.04: Page Fault Processor Exception (Error code 00000000)

Registers:
CS = 0060 DS = 007B ES = 007B FS = 007B GS = 007B SS = 0068
EAX = 7FE92000 EBX = A9AB0A80 ECX = 00000000 EDX = 800BA1E2
ESI = C06830E0 EDI = 838BC5C8 EBP = C0360ED0 ESP = C0360EB4
EIP = 8039ABEF FLAGS = 00010246
8039ABEF 8B00 MOV EAX, [EAX]=?
EIP in ZLSS.NSS at code start +00087BEFh
Access Location: 0x7FE92000

The violation occurred while processing the following instruction:
8039ABEF 8B00 MOV EAX, [EAX]
8039ABF1 894624 MOV [ESI+24], EAX
8039ABF4 8B4F08 MOV ECX, [EDI+08]
8039ABF7 83C408 ADD ESP, 00000008
8039ABFA 85C9 TEST ECX, ECX
8039ABFC 7C10 JL 8039AC0E
8039ABFE 8B7B04 MOV EDI, [EBX+04]
8039AC01 8B03 MOV EAX, [EBX]
8039AC03 85FF TEST EDI, EDI
8039AC05 754E JNZ 8039AC55



Running process: Server 14 Process
Thread Owned by NLM: SERVER.NLM
Stack pointer: C0360F60
OS Stack limit: C0359020
CPU 0 (Thread C03575E0) is in a NO SLEEP state
Scheduling priority: 67371008
Wait state: 50500F0 Waiting for work
Stack: -C0683108 (ZLSS.NSS|ZIO_ErrorLog+28)
--800BA1D8 ?
--00000001 ?
--C0382060 (LOCNLM32.NLM|NWUXEnableOemEuro+1C70)
--00000016 ?
--838BC5C8 ?
--8025CAD0 ?
--C0360F08 ?
8039B1CA (ZLSS.NSS|ZFSMAL_ReadBlkDone+EA)
--838BC5C8 ?
--00000016 ?
--00004EF0 ?
--00000005 ?
--00000000 ?
--00000000 ?
--00000000 ?
--00000001 ?
--A9AB0A80 ?
--00000000 ?
--00000000 ?
--8025CAD0 ?
--C0360F20 ?
C0387F1F (MAL.NSS|zMALFinishIOMsg+1F)
--802CE140 ?
--8025CAD0 ?
--00000016 ?
--00000000 ?
--C0360F38 ?
C03888D2 (MAL.NSS|MalCallback+52)
--802CE140 ?
--2C7C1040 ?
-C067A144 (MAL.NSS|MALCallbackEvent+0)
C0388880 (MAL.NSS|MalCallback+0)
-C067A144 (MAL.NSS|MALCallbackEvent+0)
0035DDA8 (SERVER.NLM|kDoFastWorkToDo+28)
-C067A144 (MAL.NSS|MALCallbackEvent+0)
--00000000 ?
--00000002 ?
--2C7C1040 ?
-C067A144 (MAL.NSS|MALCallbackEvent+0)
--00000000 ?
--2C7C1040 ?
00224F5C (SERVER.NLM|kWorkToDoCheckAllRunFast+A4)
--2C7C1040 ?
--00000000 ?
--00000001 ?
--00000000 ?
--FE56E180 ?
00211A89 (SERVER.NLM|WorkerThread+195)
--00000000 ?
--C03575E0 ?
--00000000 ?
--C03575E0 ?
0021ED88 (SERVER.NLM|TcoNewSystemThreadEntryPoint+40)
--C03575E0 ?
--00000000 ?
--00000000 ?
--00000000 ?
--00000000 ?
--00000000 ?
--00000000 ?
--00000000 ?
--00000000 ?
--00000000 ?
--00000000 ?
--00000000 ?
--34343434 ?
--00000000 ?
--00000000 ?
--00000000 ?
--00000000 ?
--00000000 ?
--00000000 ?
--00000000 ?
--00000000 ?
--00000000 ?
--00000000 ?
--00000000 ?
--00000000 ?
--00000000 ?
--00000000 ?
--00000000 ?
--00000000 ?

Stack dump exceeded the valid memory limit

Additional Information:
The CPU encountered a problem executing code in ZLSS.NSS. The problem may be in that module or in data passed to that module by a process owned by SERVER.NLM.

Am I looking at some kind of NSS Volume corruption here or something else? Can I backrev the ZLSS.NSS file to a previous version and correct the problem?

Thanks for any help.

Walt