Snanmvt.exe Access Violation in SNADMOD!sbpibhrl

• Microsoft SNA Server, versions 2.11, 2.11 SP1, 2.11 SP2, 3.0
  on the following platforms: NT

SYMPTOMS

The SNANetMn service, which is started automatically by SNA Server to handle routing of alert messages from SNA Server to Netview, may encounter an access violation when it is dynamically stopped by SNA Server.

There may be no visible failure to the administrator, except for problems with SNA Server alerting to Netview, and an entry in the <Ntroot>\Drwtsn32.log file, such as:

Application exception occurred:
   App: snanmvt.DBG (pid=331)
   Exception number: c0000005 (access violation)

< data omitted >

State Dump for Thread Id 0x14c

eax=00cc075c ebx=77f42119 ecx=00000000 edx=00cc0000 esi=00392d00
edi=00050005
eip=10005018 esp=002cff2c ebp=002cffec iopl=0         nv up ei pl zr na po
nc
cs=001b  ss=0023  ds=0023  es=0023  fs=0038  gs=0000
efl=00000246

function: sbpibhrl

<data omitted>

FAULT ->10005018 c70100000000     mov     dword ptr [ecx],0x0
            ds:00000000=????????

*----> Stack Back Trace <----*

FramePtr ReturnAd Param#1  Param#2  Param#3  Param#4  Function Name
002cff64 00351a34 00392d00 00052868 00000001 00353976 SNADMOD!sbpibhrl
   (FPO: [EBP 0x002cffec] [1,11,4])
002cff74 00353976 003539b4 00000000 12990001 00cb11cc snanmvt!sbpbterm
   (FPO: [0,0,2])
002cff78 003539b4 00000000 12990001 00cb11cc 00000001 snanmvt!sbpgterm
   (FPO: [2,0,0])
002cff84 00cb11cc 00000001 00052868 00000000 00052860 snanmvt!sbpgmain
   (FPO: [0,0,0])
002cffa8 77e3167a 00000001 00052868 00000000 77f46c2e
snasvc!ServiceMainFunction
   (FPO: [2,3,3])
002cffb8 77f46c2e 00052860 00000000 00000000 00052860
advapi32!ScSvcctrlThreadA
   (FPO: [1,0,1])
002cffec 00000000 77e3166c 00052860 00000000 52485324
kernel32!BaseThreadStart
00000000 00000000 00000000 00000000 00000000 00000000 snanmvt!<nosymbols> 

CAUSE

When the SnaNetMn service is stopped, the service was attempting to release a NULL control block, leading to an access violation.

RESOLUTION

Updates to SNA Server versions 2.11, 2.11 Service Pack 1, 2.11 Service Pack 2, and 3.0 are available to correct this problem.

STATUS

Microsoft has confirmed this to be a problem in SNA Server versions 2.11, 2.11 Service Pack 1, 2.11 Service Pack 2, and 3.0. This problem was corrected in the latest Microsoft SNA Server 3.0 U.S. Service Pack. For information on obtaining the service pack, query on the following word in the Microsoft Knowledge Base (without the spaces):

S E R V P A C K

Additional query words:

Keywords : kbnetwork prodsna kbbug3.00 kbbug2.11 kbbug2.11.sp1 kbfix3.00.sp1 snaserverservice
Version : WINDOWS:2.11,2.11 SP1,2.11 SP2,3.0
Platform : WINDOWS
Issue type : kbbug