DOCUMENT:Q123481 08-AUG-2001 [winnt] TITLE :Limit of Two Concurrent Print Queues from Windows NT to LANMan PRODUCT :Microsoft Windows NT PROD/VER:3.10 | 2.20 OPER/SYS: KEYWORDS: ====================================================================== 3.10 | 2.20 WINDOWS | OS/2 kbprint kbnetwork kbbug3.10 kbfix3.10.sp3 kbfix3.50 ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft Windows NT Server version 3.1 - Microsoft Windows NT Workstation version 3.1 - Microsoft Windows NT Advanced Server, version 3.1 - Microsoft LAN Manager, version 2.2 ------------------------------------------------------------------------------- SYMPTOMS ======== When a computer running Windows NT version 3.1 is configured to redirect several print queues from a LAN Manager for UNIX 2.2 server, the system reports the following in the event log: System Error 1220 AN ATTEMPT WAS MADE TO ESTABLISH A SESSION TO A LANMANAGER SESSION BUT THERE ARE TOO MANY SESSIONS ALREADY ESTABLISHED. Print jobs also stack up as they wait their turn to print and the server beeps continually. CAUSE ===== This error occurs because of a Windows NT redirector limit of two sessions with an OS/2 server. Some OS/2 and LAN Manager for UNIX servers can only handle two login sessions from one client. The Windows NT version 3.1 redirector can't tell whether the OS/2 server is one that supports only two logons, or if it supports more, so it tries two (even though Microsoft LAN Manager version 2.2 supports more than two). RESOLUTION ========== WARNING: Using Registry Editor incorrectly can cause serious, system-wide problems that may require you to reinstall Windows NT to correct them. Microsoft cannot guarantee that any problems resulting from the use of Registry Editor can be solved. Use this tool at your own risk. To resolve this issue: 1. Upgrade to Windows NT version 3.5. 2. Run Registry Editor (REGEDT32.EXE). 3. From the HKEY_LOCAL_MACHINE subtree, go to the following key: \SYSTEM\CurrentControlSet\Services\Rdr\Parameters 4. From the Edit menu choose Add Value. 5. Add the following: Value Name: Os2SessionLimit Data Type: REG_DWORD Data: 100 Radix: Hex STATUS ====== Microsoft has confirmed this to be a problem in Windows NT version 3.1. This problem was corrected in Windows NT 3.5. This problem was corrected in the latest U.S. Service Pack for Windows NT 3.1. For information on obtaining this update, query on the following word in the Microsoft Knowledge Base (without the spaces): S E R V P A C K Additional query words: prodnt 3.10 3.50 2.20 ====================================================================== Keywords : Technology : kbWinNTsearch kbWinNTWsearch kbWinNTW310 kbWinNTSsearch kbWinNTS310 kbWinNTAdvSerSearch kbWinNTAdvServ310 kbWinNTS310search kbAudDeveloper kbWinNT310Search kbWinNTW310Search kbLanManSearch kbLanMan220 Version : 3.10 | 2.20 ============================================================================= THE INFORMATION PROVIDED IN THE MICROSOFT KNOWLEDGE BASE IS PROVIDED "AS IS" WITHOUT WARRANTY OF ANY KIND. MICROSOFT DISCLAIMS ALL WARRANTIES, EITHER EXPRESS OR IMPLIED, INCLUDING THE WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE. IN NO EVENT SHALL MICROSOFT CORPORATION OR ITS SUPPLIERS BE LIABLE FOR ANY DAMAGES WHATSOEVER INCLUDING DIRECT, INDIRECT, INCIDENTAL, CONSEQUENTIAL, LOSS OF BUSINESS PROFITS OR SPECIAL DAMAGES, EVEN IF MICROSOFT CORPORATION OR ITS SUPPLIERS HAVE BEEN ADVISED OF THE POSSIBILITY OF SUCH DAMAGES. SOME STATES DO NOT ALLOW THE EXCLUSION OR LIMITATION OF LIABILITY FOR CONSEQUENTIAL OR INCIDENTAL DAMAGES SO THE FOREGOING LIMITATION MAY NOT APPLY. Copyright Microsoft Corporation 2001.