Notes/Domino 6 and 7 Forum : Domino 6.0.1 sporadic server crash

Our Domino server is crashing at random intervals, generating the nsd log below. I would greatly appreciate any help that I can get from anyone who knows how to decypher this log. I suspect it is related to my anti-virus program, but cannot be sure. We're running Command anti-virus version 4.90.2 in conjunction with Group Technologies IQsuite version 7b. Thanks.

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### FATAL THREAD 18/55 [ nRouter:07b8:045c]
### FP=2067dad0, PC=77fcb032, SP=2067d938, stksize=408
Exception code: c0000005 (ACCESS_VIOLATION)
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[ 1] 0x77fcb032 ntdll.__eFSQRT+3432 (be0000,0,1000,be42c0)
@[ 2] 0x60981103 nnotes.__heap_alloc+237 (1000,60980fe7,1000,0)
@[ 3] 0x60980ffa nnotes.__nh_malloc+16 (1000,2067db4c,0,1ec73428)
@[ 4] 0x6006ed5b nnotes.LSSiMEMMGR::OSHeapAllocateSegment+155 (1000,1ec73428,0,0)
@[ 5] 0x6006ef3e nnotes.LSSiMEMMGR::OSHeapExpand+110 (1ec73428,1,0,1ec73428)
@[ 6] 0x60027c1d nnotes.LSSiMEMMGR::OSHeapBlkAlloc+269 (60,60,0,1ecea5c8)
@[ 7] 0x6002e619 nnotes.LSSiMEMMGR::BlkAlloc+137 (be42c0,1ec73428,60,0)
@[ 8] 0x60058430 nnotes.LSsInstance::LiteralAlloc+112 (be5c6c,22,44,0)
@[ 9] 0x60082c37 nnotes.LSsInstance::LitAddStr+103 (1ecea5c8,20ae9f20,2,44)
@[10] 0x6008aaab nnotes.LSsInstance::StringCreateLong+91 (1ecea5c8,20ae9f20,ffffffff,2)
@[11] 0x6008aaf8 nnotes.LSsInstance::StringCreate+40 (1ecea5c8,20ae9f20,ffff,2)
@[12] 0x60663701 nnotes.LsConv::ConvertNotesStrToLSStr+97 (1ecea5c8,22082670,20670022,20ae9f20)
@[13] 0x60132ea4 nnotes.LsConv::TextListToArray+196 (1ec77c7c,220812c4,2067de9c,0)
@[14] 0x60663e07 nnotes.LsConv::GetVariantValue+503 (1ecea5c8,220812c4,1090501,16b2)
@[15] 0x6266b771 nlsxbe.ANNote::ANNGetItemValue+97 (16b2,109dad4,10a0cc8,2067e2fc)
@[16] 0x62645fa4 nlsxbe.ANNote::ANDispatchMethod+132 (2067e388,2067e358,1ec76b0c,2067e388)
@[17] 0x62642ffa nlsxbe._ANCLASSCONTROL@16+2074 (1ecea5c8,109,2067e33c,2067e388)
@[18] 0x62643309 nlsxbe._tag_NotesADTControl::ClassControl+25 (10a0cf4,1ecea5c8,109,2067e33c)
@[19] 0x600582a2 nnotes.LSsInstance::AdtCallBack+226 (1ecea5c8,626427e0,109,1ec76af0)
@[20] 0x6006e9dd nnotes.LScObjCli::ProdMethodCall+61 (1ec76ab0,495,208b6318,10002)
@[21] 0x6006e8d4 nnotes.LSsThread::AdtDoProdCallout+164 (293fc6a8,1ec76ab0,10002,208b62cc)
@[22] 0x6006e7ef nnotes.LSsThread::AdtCallMethod+47 (3,208b6728,1,293fc6a8)
@[23] 0x600223d2 nnotes.LSsThread::NRun+6514 (293fc6a8,20af8240,293fc6a8,2067e4fc)
@[24] 0x60022b76 nnotes.LSsThread::Run+182 (293fc6a8,20af8240,1ecea5c8,293f0018)
@[25] 0x600b20df nnotes.LSsThread::ExecuteProc+319 (293fc6a8,20af8240,293f0018,0)
@[26] 0x600b23b0 nnotes.LSsInstance::Run+496 (1ecea5c8,20af8240,293f0018,0)
@[27] 0x6090dbb3 nnotes.LSIThread::Run+67 (206827f4,1e,1,20670000)
@[28] 0x6090dec6 nnotes.LSIThread::RunToCompletion+310 (206827f4,1e,1,60a84c8c)
@[29] 0x6090916d nnotes.CLSIDocument::RunScript+685 (206835f4,d4,1,609a894c)
@[30] 0x60598d41 nnotes.CRawActionLotusScript::Run+577 (22b4,20681774,d2,2067e844)
@[31] 0x60595536 nnotes.CRawAction::Run+54 (0,206808f4,d2,2067e860)
@[32] 0x605950f3 nnotes.CRawAction::Execute+275 (20681554,0,2067f048,60591b94)
@[33] 0x60591e66 nnotes.CAssistant::RunAlone+22 (206828f4,206808f4,206828f4,206808f4)
@[34] 0x60591b94 nnotes.CAssistant::Run+3796 (0,2067f1e8,206808f4,2067f69c)
@[35] 0x605a6217 nnotes._AgentRun@16+887 (206828f4,20681774,1f93,10)
@[36] 0x608bab38 nnotes._ProcessFilter@36+248 (13494f8,4e4,d2,206808f4)
@[37] 0x608b9b0e nnotes._MailDeliverMessage@64+1070 (13494f8,20670000,ffffffff,1faab9c8)
@[38] 0x0041089a nRouter._AttemptMessageDelivery@48+682 (13494f8,2067fcd8,0,0)
@[39] 0x00410357 nRouter._DeliverToDestination@32+1831 (444260,2067fcd8,0,22a99ba)
@[40] 0x0040d8dc nRouter._Transfer@32+588 (444260,95c0001,1,2067fcd8)
@[41] 0x00415faf nRouter._TransferThread@4+607 (1,0,0,0)
@[42] 0x6011d7b4 nnotes._ThreadWrapper@4+212 (0,0,0,0)
[43] 0x7c4e987c KERNEL32.SetThreadExecutionState+551 (6011d6e0,0,0,dddd04d2)

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### PASS 2 : FATAL THREAD with STACK FRAMES 18/55 [ nRouter:07b8:045c]
### FP=2067dad0, PC=77fcb032, SP=2067d938, stksize=408
Exception code: c0000005 (ACCESS_VIOLATION)
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# ---------- Top of the Stack ----------
# 2067d938 00be42c0 29301c38 00000000 2067dba0 |.B..8.0)......g |
# 2067d948 0106f37c 2001001c 00000000 00000000 ||...... ........|
# 2067d958 00000000 00000000 00000000 00000000 |................|
# 2067d968 20b71618 29312158 00000000 00000000 |... X!1)........|
# 2067d978 00000000 00000000 00000000 2067debc |..............g |
# 2067d988 6236b7c0 2067dba0 00000018 2067e210 |..6b..g ......g |
# 2067d998 0000000c 00000000 00000000 00000000 |................|
# 2067d9a8 00000000 00000000 00000000 00000000 |................|
# 2067d9b8 00000000 00000000 000cc53a 05256dfa |........:....m%.|
# 2067d9c8 51190006 552d0000 6dfa0037 53410525 |...Q..-U7..m%.AS|
# 2067d9d8 6df1005f 00000000 05b86734 0000c39f |_..m....4g......|
# 2067d9e8 00000000 05b86734 0000c39f 00000000 |....4g..........|
# 2067d9f8 00000000 00000000 00000000 600010eb |...............`|
# 2067da08 60001128 0112265e 011226a2 0112265e |(..`^&...&..^&..|
# 2067da18 2067da28 600010be 0112265e 00000001 |(.g ...`^&......|
# 2067da28 2067da3c 6000129f 011226a2 00000000 |<.g ...`.&......|
# 2067da38 2067da60 60003e5c 60c3dd20 9574000d |`.g \>.` ..`..t.|
# 2067da48 00000000 0000c436 0000c000 0000c39f |....6...........|
# 2067da58 600011cf 6000122f 0112265e 0112265e |...`/..`^&..^&..|
# 2067da68 2067da7c 6000130f 011226a2 00be0000 ||.g ...`.&......|
# 2067da78 0000019d 2940c008 2940c000 00c0026a |......@)..@)j...|
# 2067da88 00c00201 00000201 6000130f 00c00200 |...........`....|
# 2067da98 00be5c6c 2940d008 2940dcf0 00be0178 |l\....@)..@)x...|
# 2067daa8 2940c000 00be5c6c 00001008 1ec77ea8 |..@)l\.......~..|
# 2067dab8 00be42c0 2067d584 2067dafc 77f98191 |.B....g ..g ...w|
# 2067dac8 77f89640 00000000 2067db0c 60981103 |@..w......g ...`|