DOCUMENT:Q140816 13-JUN-2001 [sna] TITLE :EHNAPPC Data Stream Header Data Being Passed to TP PRODUCT :Microsoft SNA Server PROD/VER:WINDOWS:2.0,2.1,2.11 OPER/SYS: KEYWORDS: ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft SNA Server, versions 2.0, 2.1, 2.11, on platform(s): - the operating system: Microsoft Windows NT ------------------------------------------------------------------------------- SYMPTOMS ======== When using mapped APPC conversations with the Enhanced Router API (EHNAPPC.DLL), transaction programs (TPs) receive the extra data even though they should not. CAUSE ===== When sending data, the SNA Server EHNAPPC.DLL is passing the extra 4-byte Basic APPC conversation header into the APPC data stream when using a MAPPED conversation. However, it should ignore the 4-byte header. The header consists of: - 2 bytes that are reserved for LL field designation. - 2 bytes for the length of the data field. RESOLUTION ========== Microsoft modified the EHNAPPC.DLL file so that it only passed up the data to the transaction program, not the 4-byte header. STATUS ====== Microsoft has confirmed this to be a problem in SNA Server for Windows NT. This problem was corrected in the latest SNA Server for Windows NT, 2.11 U.S. Service Pack. For information on obtaining the Service Pack, query on the following word in the Microsoft Knowledge Base (without the spaces): S E R V P A C K Additional query words: prodsna 2.00 2.10 2.11 3.50 3.51 ====================================================================== Keywords : Technology : kbAudDeveloper kbSNAServSearch Version : WINDOWS:2.0,2.1,2.11 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. 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.