DOCUMENT:Q123824  10-NOV-1999  [pcmail]
TITLE   :X400: Err Msg: ERROR 1 (TRAN): Invalid TPDU 70 in State 4
PRODUCT :Microsoft Mail For PC Networks
PROD/VER:MS-DOS:3.2x
OPER/SYS:
KEYWORDS:

======================================================================
-------------------------------------------------------------------------------
The information in this article applies to:

 - Microsoft Mail Gateway to X.400, version 3.2x 
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SYMPTOMS
========

Version 3.2x of the Microsoft Mail Gateway for X.400 may display the following
message in the X400xxxx.LOG file if verbose and debug logging are enabled
(-lvd):

   Incoming ER TPDU on connection xx:
   0970001A 00C10302 F080
   ERROR 1 (TRAN): Invalid TPDU 70 in state 4

CAUSE
=====

The data field in the message has a field length of zero. This is allowed if it
is the last packet.

RESOLUTION
==========

The remote X400 message transfer agent (MTA) must be able to accept the last
packet in the conversation if it has a data field length of zero. Contact the
administrator of the other X400 MTA to verify it will accept an end packet of
data field length zero.

MORE INFORMATION
================

A complete explanation of the TPDU follows:

   rv[ 10] 0970001A 00C10302 F080
 
      09  length       = 9
      70  TPDU type    = ER
      001A             = Destination reference
      00  reject cause = Not specified
      C1 03 02 F080    = The invalid TPDU that the other side is
                         complaining about.

The invalid TPDU:

      02 length        = 2
      F0 TPDU type     = DT
      80  EOT or the end flag.

The Microsoft X.400 Gateway may create a zero length data field if the length of
the message happened to fall on a DT TPDU boundary. This is not a violation of
the X.400 standard. According to X.224 section 6.3.3.:

   All DT TPDUs except the last DT TPDU in a sequence greater than one shall
   have a length of data greater than zero.

This is the last DT TPDU in a sequence (the EOT flag being on), so it is allowed
to have a zero length user data field.

Additional query words: x400 errmsg

======================================================================
Keywords          :  
Technology        : kbMailSearch kbMailGateSearch kbZNotKeyword3 kbMailGatex40032xSearch
Version           : MS-DOS:3.2x

=============================================================================

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