Application Exceptions When Opening a SNA Server 2.11 COM.CFG
ID: Q167682
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The information in this article applies to:
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Microsoft SNA Server, versions 3.0, 3.0 SP1
SYMPTOMS
An SNA Server 3.0 system may generate an application exception in an SNA
Server module when you try to open an SNA Server 2.11 configuration file.
This only occurs if the SNA Server 2.11 configuration contains duplicate LU
numbers on a particular connection for a 3270 LU and a dependent LU 6.2 LU.
This problem has been observed to cause application exceptions in the
SnaBase service and in SNA Server Manager (Snaexp.exe).
CAUSE
When SNA Server opens a configuration file (Com.cfg), it does two checks on
3270 LUs. The first check ensures that the LU number is unique among all
3270 LUs on a connection. The second check is used to look for LU number
conflicts between 3270 LUs and dependent APPC LUs configured on a server.
If either of these fail, the LU record is destroyed and an error variable
set.
The application exception occurs because the second check is being
performed without regard to the error code being returned by the first
check. This results in a destroyed LU record being passed to the test
routine, causing the application exception.
RESOLUTION
SNA Server has been updated to prevent it from performing the second check
on 3270 LUs if the first check returns an error code.
STATUS
Microsoft has confirmed this to be a problem in SNA Server versions 3.0 and
3.0 SP1. This problem was corrected in the latest SNA Server version 3.0
U.S. Service Pack. For information on obtaining this Service Pack, query on
the following word in the Microsoft Knowledge Base (without the spaces):
S E R V P A C K
MORE INFORMATION
When this problem occurs, a Drwtsn32.log containing information similar to
the following will be generated in the Windows NT directory:
Application exception occurred:
App: exe\snabase.DBG (pid=<process id>)
When: <date> @ <time>
Exception number: c0000005 (access violation)
function: ConflictingLocalLuNumbers
6120bf4e 53 push ebx
6120bf4f 56 push esi
6120bf50 57 push edi
6120bf51 8b7c2414 mov edi,[esp+0x14]
ss:031de38f=????????
6120bf55 55 push ebp
6120bf56 50 push eax
6120bf57 57 push edi
6120bf58 66bd0100 mov bp,0x1
6120bf5c e85f1b0000 call GetAddr (6120dac0)
6120bf61 8bd8 mov ebx,eax
FAULT ->6120bf63 8b406c mov eax,[eax+0x6c]
ds:01beea06=????????
6120bf66 50 push eax
6120bf67 e874f0ffff call GetGrpCount (6120afe0)
6120bf6c 6689442412 mov [esp+0x12],ax
ss:031de390=????
6120bf71 663bc5 cmp ax,bp
6120bf74 7244 jb ConflictingLocalLuNumbers+0x7a
(6120bfba)
6120bf76 668b74241c mov si,[esp+0x1c]
ss:031de390=????
6120bf7b 55 push ebp
6120bf7c 8b436c mov eax,[ebx+0x6c]
ds:01beea06=????????
6120bf7f 50 push eax
6120bf80 e88bf0ffff call GetGrpNthItem (6120b010)
6120bf85 50 push eax
Additional query words:
upgrade trap
Keywords : kbnetwork snabaseservice snamanager kbfix3.00.sp2
Version : WINDOWS:3.0,3.0 SP1
Platform : WINDOWS
Issue type : kbbug