TN3270E Printer Can't Connect; LUSessionStateConfused

ID: Q170661

The information in this article applies to:

Microsoft SNA Server, versions 2.11 and 3.0

SYMPTOMS

After you upgrade from SNA Server 2.11 Service Pack 1 (SP1) to SP2 (or SNA 3.0 or 3.0 SP1), a TN3270E printer emulator may be unable to get a printer session through the TN3270 server. The TN3270 server reports Event 902 to the Windows NT application event log, indicating an LUSessionStateConfused error in the InboundLULUData function.

CAUSE

The TN3270 server is expecting 3270 data by checking for DT_3270_DATA (screen data) but is ignoring valid DT_SCS_DATA (print data).

STATUS

Microsoft has confirmed this to be a problem in SNA Server version 2.11 Service Pack 2 (SP2) and 3.0 SP1. This problem was corrected in the latest SNA Server version 3.0 U.S. Service Pack. For information on obtaining this 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

A TN3270 internal trace will indicate the following entries:

   >05/01 18:50:30.582 (+ smidgen )  Event=TEV_LogicError InboundLULUData
   LUSessionStateConfused

   >05/01 18:50:30.582 (+ smidgen )  Event=TEV_SessionTerminationScheduled
   Thread = 0x00000056  Session = 0x00264278  Socket = 0x000001A8
   InternalError

Here is a summary of the message flow sequence of the failure condition:

   TN3270 emulator  TN3270 Server  Host
   ===============  =============  ================
   <TN3270E session negotiated>

      <- BIND (printer)
   <- BIND image
   BIND +RSP ->
      <- BID
   BID +RSP ->
      <- RQD LU DATA

   <- RQD LU DATA
   +RSP ->
   +RSP ->
   RQE LU DATA ->
   * error occurs *

Keywords          : kbnetwork snatn3270 kbfix3.00.sp2 
Version           : 2.11 3.0
Platform          : WINDOWS
Issue type        : kbbug
Solution Type     : kbfix

Last Reviewed: March 20, 1998