DOCUMENT:Q313202 08-MAY-2002 [sna] TITLE :SSO Fails If Attach Does Not Contain LUWID or Other Subfield PRODUCT :Microsoft SNA Server PROD/VER::4.0,4.0 SP1,4.0 SP2,4.0 SP3,4.0 SP4 OPER/SYS: KEYWORDS:kbDSupport sna4 kbsna400sp1 kbsna400sp2 kbsna400sp3 kbhis2000 kbhis2000bug kbsna400sp4 ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft SNA Server, versions 4.0, 4.0 SP1, 4.0 SP2, 4.0 SP3, 4.0 SP4 - Microsoft Host Integration Server 2000 ------------------------------------------------------------------------------- SYMPTOMS ======== Advanced Program-to-Program Communications (APPC) or Common Programming Interface for Communications (CPI-C) applications that are configured to use the Single Sign-On (SSO) feature may fail to connect to a host system if the FMH-5 (function management header) Attach message does not contain one or more of the following subfields: - Logical Unit of Work Identifier (LUWID) subfield - Conversation Correlator field - Password subfield (a subfield in the Access Security Information subfield, which also ordinarily includes a User ID subfield) CAUSE ===== The SNA Server service (Snaservr.exe) fails to correctly parse short FMH-5 Attach messages. The FMH-5 Attach messages are short because they lack one or more subfields. RESOLUTION ========== SNA Server 4.0 A supported fix is now available from Microsoft, but it is only intended to correct the problem described in this article and should be applied only to systems experiencing this specific problem. This fix may receive additional testing at a later time, to further ensure product quality. Therefore, if you are not severely affected by this problem, Microsoft recommends that you wait for the next Microsoft SNA Server version 4.0 service pack that contains this fix. To resolve this problem immediately, contact Microsoft Product Support Services to obtain the fix. For a complete list of Microsoft Product Support Services phone numbers and information about support costs, please go to the following address on the World Wide Web: http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS NOTE: In special cases, charges that are normally incurred for support calls may be canceled, if a Microsoft Support Professional determines that a specific update will resolve your problem. Normal support costs will apply to additional support questions and issues that do not qualify for the specific update in question. The English version of this fix should have the following file attributes or later: +---------------------------------------------+ | File name | Date | Time | +---------------------------------------------+ | Snaservr.exe | 07-December-2001 | 7:50 A.M. | +---------------------------------------------+ NOTE: Because of file dependencies, the most recent fix that contains the above files may also contain additional files. Host Integration Server 2000 No fix is available for this problem in Host Integration Server 2000 at this time. STATUS ====== SNA Server 4.0 Microsoft has confirmed this to be a problem in SNA Server versions 4.0, 4.0 Service Pack (SP) 1, 4.0 SP2, 4.0 SP3, and 4.0 SP4. Host Integration Server 2000 Microsoft has confirmed this to be a problem in Host Integration Server 2000. MORE INFORMATION ================ The following are configuration settings that result in an FMH-5 Attach message that does not include one or more of the necessary fields: - If the APPC or CPI-C application is running on an SNA Server 4.0 client or SNA Server 4.0 system that is configured with registry entry "LUWIDSUP=NO", the APPC dynamic link library (DLL) will not ask the SNA Server service to generate an LUWID. The resulting FMH-5 Attach message will not include the Logical Unit of Work Identifier subfield. - If an APPC or CPI-C application is designed to use a security type of AP_SAME or CM_SECURITY_SAME, the FMH-5 Attach message may not include the password subfield as part of the Access Security Information subfield. For more information on these and other fields and parameters that are included in FMH-5 Attach messages, see "FM Headers" in the IBM SNA Formats guide (GA27-3136). Additional query words: ====================================================================== Keywords : kbDSupport sna4 kbsna400sp1 kbsna400sp2 kbsna400sp3 kbhis2000 kbhis2000bug kbsna400sp4 Technology : kbAudDeveloper kbSNAServSearch kbHostIntegServ2000 kbSNAServ400 kbSNAServ400SP1 kbSNAServ400SP2 kbSNAServ400SP3 kbSNAServ400SP4 Version : :4.0,4.0 SP1,4.0 SP2,4.0 SP3,4.0 SP4 Issue type : kbbug Solution Type : kbfix ============================================================================= 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. 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