FIX: A computer that uses the IP-DLC link service to communicate with an IBM mainframe may experience an access violation in snaipdlc!nrt_rtp_status_check_gaps function on Host Integration Server 2004 (898555)

SYMPTOMS

A computer that is running Microsoft Host Integration Server 2004 and that uses the IP-DLC link service to communicate with an IBM mainframe may experience an access violation in snaipdlc!nrt_rtp_status_check_gaps function.

When this problem occurs, the IP-DLC link service unexpectedly quits. Therefore, all connected users lose their existing host sessions if the host sessions were established over host connections or peer connections by using the IP-DLC link service.

Additionally, event messages that are similar to the following are logged: Event ID: 1000
Source: Application Error
Description: Faulting application snalink.exe, version version number, faulting module snaipdlc.dll, version version number, fault address memory address
Event ID: 624
Source: SNA Server
Description: Creating dump file C:\Program Files\Microsoft Host Integration Server\traces\snadump.log for snalink.exe

RESOLUTION

Hotfix information

A supported hotfix is now available from Microsoft, but it is only intended to correct the problem that is described in this article. Only apply it to systems that are experiencing this specific problem. This hotfix may receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next Host Integration Server 2004 service pack that contains this hotfix.

To resolve this problem immediately, contact Microsoft Product Support Services to obtain the hotfix. For a complete list of Microsoft Product Support Services telephone numbers and information about support costs, visit the following Microsoft Web site:

http://support.microsoft.com/contactus/?ws=support

Note In special cases, charges that are ordinarily incurred for support calls may be canceled if a Microsoft Support Professional determines that a specific update will resolve your problem. The usual support costs will apply to additional support questions and issues that do not qualify for the specific update in question.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.

   Date         Time   Version     Size       File name
   -------------------------------------------------------
   29-Sep-2004  22:44  6.0.1906.0    959,488  Snaipdlc.dll
   29-Sep-2004  22:44  6.0.1906.0    407,552  Snaservr.exe
   29-Sep-2004  22:44  6.0.1906.0  2,944,512  Trcipdlc.dll
   29-Sep-2004  22:44  6.0.1906.0    847,360  Trcservr.exe

Note Because of file dependencies, the most recent hotfix that contains these files may also contain additional files.

MORE INFORMATION

Stack output

If Drwtsn32.exe is the system's default debugger and is configured to create a User.dmp file, the stack output that appears in the User.dmp file will be similar to the following when this problem occurs:

eax=00b57bb0 ebx=70079519 ecx=00000000 edx=70078398 esi=80000000 edi=70073f09
eip=00646a1b esp=009fff00 ebp=0000448f iopl=0         nv up ei pl zr na po nc
cs=001b  ss=0023  ds=0023  es=0023  fs=0038  gs=0000             efl=00000246
snaipdlc!nrt_rtp_status_check_gaps+0x1a3:
00646a1b 8b11             mov     edx,[ecx]         ds:0023:00000000=????????
0:009> kb
  *** Stack trace for last set context - .thread/.cxr resets it
ChildEBP RetAddr  Args to Child              
009fff14 00647283 0000050f 00a83c30 009fff4c snaipdlc!nrt_rtp_status_check_gaps+0x1a3
009fff30 00647ed8 00a83c30 00b57e21 00000000 snaipdlc!nrt_rtp_status_receive+0x4af
009fff4c 0062064b 00a83c30 00000008 00000000 snaipdlc!nrt_rtp_arb_receive+0x149
009fff68 0062098d 0000050f 00000000 00abff60 snaipdlc!nrt_rtp_receive+0x377
009fff7c 0060dfa6 00a83c30 00000008 00000011 snaipdlc!nrt_receive_proc+0x8d
009fff90 0060e322 00000008 00a83c30 009fffec snaipdlc!nba_dispatch_process+0x95
009fffac 0060d6fe 00000000 0060d79a 77e4a990 snaipdlc!nba_scheduler+0x7d
009fffb4 0060d79a 77e4a990 00000000 00000000 snaipdlc!nba_spin+0x14
009fffb8 77e4a990 00000000 00000000 00000000 snaipdlc!spinner_thread+0x26
009fffec 00000000 0060d774 00000000 00000000 kernel32!BaseThreadStart+0x34 [d:\srv03rtm\base\win32\client\support.c @ 533]