Knowledge Base

SNA Server Access Violation Occurs after Dynamically Adding 3270 LUs

Article ID: 254000

Article Last Modified on 11/24/2003

APPLIES TO

Microsoft SNA Server 4.0
Microsoft SNA Server 4.0 Service Pack 1
Microsoft SNA Server 4.0 Service Pack 2
Microsoft SNA Server 4.0 Service Pack 3

This article was previously published under Q254000

SYMPTOMS

The SNA Server service (Snaservr.exe) may fail with an Access Violation error in routine s1pnsfol() after dynamically adding 3270 LUs to the configuration. When this occurs, the SNA Server process stops abnormally and logs the following event in the Windows NT application event log:

Event ID: 624
Source: SNA Server

If Drwtsn32.exe is configured as the default Windows NT debugger, the following Drwtsn32.log entry is also created:

Application exception occurred:

        App: exe\snaservr.dbg (pid)

        When: date time 

        Exception number: c0000005 (access violation)


[....]


State Dump for Thread Id 

eax=00000000 ebx=00000004 ecx=01190000 edx=00000000 esi=00000000 

edi=013319bc eip=0104e0ad esp=00bcfe6c ebp=0000000a iopl=0 
      
nv up ei pl zr na po nc

cs=001b  ss=0023  ds=0023  es=0023  fs=0038  gs=0000 fl=00000246


function: s1pnsfol

        0104e08a 8b0db0591801     mov     ecx,[sct (011859b0)]  
        0104e090 8bc6             mov     eax,esi
        0104e092 25ffff0000       and     eax,0xffff
        0104e097 57               push    edi
        0104e098 6a0d             push    0xd
        0104e09a 56               push    esi
        0104e09b 8d0440           lea     ax,[eax+eax*2]  
                                              ds:00000000=????????
        0104e09e c744242000000000 mov   dword ptr [esp+0x20],0x0  
                                              ss:025ce873=????????
        0104e0a6 c1e003           shl     eax,0x3
        0104e0a9 89442428         mov     [esp+0x28],eax  
                                              ss:025ce873=????????
FAULT ->0104e0ad 8b5401ec         mov     edx,[ecx+eax-0x14]  
                                              ds:019fea07=????????
        0104e0b1 89542434         mov     [esp+0x34],edx  
                                              ss:025ce873=????????

*---- Stack Back Trace ----*

FramePtr ReturnAd Param#1  Param#2  Param#3  Param#4  Function Name
00bcfec8 010522c0 01d30d5c 00000000 00000000 00251bd0 snaservr!s1pnsfol

CAUSE

The SNA Server service encounters a problem creating an internal configuration record for the dynamically defined 3270 LU.

RESOLUTION

To resolve this problem, obtain the latest service pack for SNA Server 4.0. For additional information, click the following article number to view the article in the Microsoft Knowledge Base:

215838 How to Obtain the Latest SNA Server Version 4.0 Service Pack

The English version of this fix should have the following file attributes or later:

File name	Date	Time
Snaservr.exe	24-Jan-2000	14:42
Snaevent.dll	21-Jan-2000	09:48

NOTE: Because of file dependencies, the most recent fix that contains the preceding files may also contain additional files.

STATUS

Microsoft has confirmed that this is a problem in Microsoft SNA Server 4.0, 4.0 SP1, 4.0 SP2 and 4.0 SP3.

This problem was first corrected in SNA Server 4.0 Service Pack 4.

Keywords: kbbug kbfix kbsna400presp4fix kbqfe kbsna400sp4fix KB254000

Microsoft KB Archive/254000

Contents