KnowledgeBase Archive

An Archive of Early Microsoft KnowledgeBase Articles

View on GitHub

Q172469: Last Byte of Transparent Section Interpreted Incorrectly

Article: Q172469
Product(s): Microsoft SNA Server
Version(s): WINDOWS:3.0 SP1
Operating System(s): 
Keyword(s): kbbuglist
Last Modified: 14-MAR-2000

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

- Microsoft SNA Server, version 3.0 SP1 
-------------------------------------------------------------------------------


SYMPTOMS
========

The last byte in a transparent section gets interpreted as being outside the
transparent section when the transparent section is immediately preceded by a
control character (IE - "0D"). For instance, the following sequence has '0D'
(carriage return) followed by a transparent section starting with '35'. In this
case, the 1B (Esc character) would be inappropriately dropped and, therefore,
the remaining bytes would be sent to the printer without the leading Esc
character. This would cause the remaining bytes to be printed when they were
actually intended to be part of the escape sequence.

  0D35011B 5081F2F2 D9

CAUSE
=====

When there is a control character immediately preceding transparent sections,
there was a bug in the code which caused the print server to believe the
transparent section to be one byte shorter than it really was.

RESOLUTION
==========

A change was made to check whether a transparent byte has actually been sent to
the printer before decrementing the number of transparent bytes left to be
processed.

STATUS
======

Microsoft has confirmed this to be a problem in Microsoft SNA Server, version
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


Additional query words:

======================================================================
Keywords          :  kbbuglist
Technology        : kbAudDeveloper kbSNAServSearch kbSNAServ300SP1
Version           : WINDOWS:3.0 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.