ARCserve 11.1 SP1 is installed on NetWare 6.0 (SP5 with NWLIB6F.EXE,
NW6NSS5C
AND NCP60SP5A.EXE) Server. The server is a dedicated backup server and makes
backups
of 4 other servers (NW6.0 SP5) on the network.

Every Friday, when the full backup of our rotation backup job runs,
fstape.nlm consumes 100% of the server memory and cache moemory allcator
errors occure. On other week days the the backup runs fine without any
errors. Sometimes the server abended on friday during backup:


Server XXXXX halted Saturday, 8 April 2006 17.40.20,571
Abend 1 on P00: Server-5.60.05: Page Fault Processor Exception (Error code
00000000)

Registers:
CS = 0008 DS = 0010 ES = 0010 FS = 0010 GS = 0010 SS = 0010
EAX = B76B22A0 EBX = C76B1000 ECX = B76B1E40 EDX = B76B2298
ESI = B76B4040 EDI = 00000000 EBP = 91EAFAD0 ESP = 91EAF9FC
EIP = 00269243 FLAGS = 00010246
00269243 8B7B1C MOV EDI,[EBX+1C]=?
EIP in SERVER.NLM at code start +0005AF43h
Access Location: 0xC76B101C

The violation occurred while processing the following instruction:
00269243 8B7B1C MOV EDI,[EBX+1C]
00269246 01F8 ADD EAX,EDI
00269248 3B18 CMP EBX,[EAX]
0026924A 0F8511010000 JNZ 00269361
00269250 833DAC2F440000 CMP [SERVER.NLM|FreeCheckFlag]=00000000,00000000
00269257 7437 JZ 00269290
00269259 8BBC24B8000000 MOV EDI,[ESP+000000B8]
00269260 8B4B1C MOV ECX,[EBX+1C]
00269263 B833333333 MOV EAX,33333333
00269268 C1E902 SHR ECX,02



Running process: FSTAPE 7 Process
Thread Owned by NLM: FSTAPE.NLM
Stack pointer: 91EAFA6C
OS Stack limit: 91EA8600
Scheduling priority: 67371008
Wait state: 3030070 Yielded CPU
Stack: --65657246 ?
--74656420 ?
--65746365 ?
--6F632064 ?
--70757272 ?
--72742074 ?
--696C6961 ?
--7220676E ?
--6F7A6465 ?
--6620656E ?
--6E20726F ?
--2065646F ?
--37427830 ?
--45314236 ?
--202C3034 ?
--65646F6E ?
--7A697320 ?
--31312065 ?
--00003231 ?
--F6A34833 ?
00332FCA (SERVER.NLM|DirectCallPollProcedures+A)
C8EA15A2 (LSL.NLM|LSLPollProcedure+42)
--00000000 ?
--00000001 ?
--00000293 ?
--00000000 ?
--00000000 ?
--F6A34837 ?
00332FCA (SERVER.NLM|DirectCallPollProcedures+A)
--00000000 ?
00214B10 (SERVER.NLM|CallRegisteredPollingRoutines+3C)
--F6A34837 ?
--00000293 ?
--00010001 ?
0022E7CC (SERVER.NLM|MpkSystemWork+18)
--F6A34837 ?
--00000293 ?
--91EAFAA8 ?
--00000000 ?
--B76B4040 ?
000134E3 (LOADER.EXE|RealModeVectorTable+407)
--91EAFAD0 ?
--00000000 ?
--B76B4040 ?
000134E3 (LOADER.EXE|RealModeVectorTable+407)
C893ACCF (THREADS.NLM|free+F)
--B76B22A0 ?
90F3ABB4 ?
--B76B22A0 ?
--000546C3 ?
90F3A960 ?
--907A8040 ?
--93651820 ?
--00000000 ?
C893B306 (THREADS.NLM|getcmd+21E)
--00000000 ?
--65657246 ?
--65657246 ?
--00000246 ?
--8F6062E0 ?
--00000000 ?
C893B144 (THREADS.NLM|getcmd+5C)
--8D6FD280 ?
--00000000 ?
C893B13C (THREADS.NLM|getcmd+54)
--8D6FD280 ?
--00000000 ?
--8F6062E0 ?
--00000000 ?
--8F6062E0 ?
-CB492750 (THREADS.NLM|(Data Start)+2750)
0022A1A8 (SERVER.NLM|TcoNewSystemThreadEntryPoint+3C)
--8F6062E0 ?
--00000000 ?
--00000000 ?
--00000000 ?
--00000000 ?
--65657246 ?
--65657246 ?
--91EA8000 ?
--65657246 ?
--65657246 ?
--65657246 ?
--65657246 ?
--65657246 ?
--65657246 ?
--65657246 ?
--65657246 ?
--65657246 ?
--65657246 ?
--65657246 ?
--65657246 ?
--65657246 ?
--65657246 ?
--65657246 ?
--65657246 ?
--65657246 ?
--65657246 ?
--65657246 ?
--65657246 ?

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

Thanks for any hints or tips for finding a solution.

regards,
Jens