DOCUMENT:Q160268 13-JUN-2001 [sna] TITLE :Missing TN3270E Header on Data to Client PRODUCT :Microsoft SNA Server PROD/VER:WINDOWS:2.11,2.11 SP1 OPER/SYS: KEYWORDS:kbnetwork kbnetserv ====================================================================== ------------------------------------------------------------------------------- The information in this article applies to: - Microsoft SNA Server, versions 2.11, 2.11 SP1, on platform(s): - the operating system: Microsoft Windows NT ------------------------------------------------------------------------------- SYMPTOMS ======== Occasionally the Microsoft TN3270E Server will not add a TN3270E header to a data message destined for the TN3270E client. This can cause the client's session hang. STATUS ====== Microsoft has confirmed this to be a problem in SNA Server version 2.11 and 2.11 Service Pack 1. This problem was corrected in the latest Microsoft SNA Server 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 MORE INFORMATION ================ In order to support several of the new functions in TN3270E, a header must prefix each data message. The header contains a DATA-TYPE field, which tells the receiver how to interpret the data portion of the message. Some possible values for the DATA-TYPE field are: Data-type Name Code Meaning -------------- ---- --------------------------------- 3270-DATA 0x00 The data portion of the message contains only the 3270 data stream. RESPONSE 0x02 The data portion of the message constitutes device-status information and the RESPONSE-FLAG field indicates whether this is a positive or negative response (see below). BIND-IMAGE 0x03 The data portion of the message is the SNA bind image from the session established between the server and the host application. UNBIND 0x04 The data portion of the message is an Unbind reason code. Additional query words: prodsna ====================================================================== Keywords : kbnetwork kbnetserv Technology : kbAudDeveloper kbSNAServSearch Version : WINDOWS:2.11,2.11 SP1 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.