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Q228920: Citrix ICA Connected Client File Access is Slow the First Time

Article: Q228920
Product(s): Microsoft Windows NT
Version(s): winnt:4.0,4.0 SP4
Operating System(s): 
Keyword(s): 
Last Modified: 08-MAY-2002

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The information in this article applies to:

- Microsoft Windows NT Server versions 4.0, 4.0 SP4, Terminal Server Edition 
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SYMPTOMS
========

When a Citrix ICA-connected client gains access to a file on a client-mapped
drive for the first time, the access time may be very slow. Subsequent usage of
that client-mapped drive behaves as expected.

CAUSE
=====

This problem occurs because the Citrix ICA client-mapped drive is not listed in
MupPrefixTable when the connection to the file is made. Therefore, Mup.sys tries
to reconcile this by searching for the specified server first through the Pkt
table, and then through the network devices. This process can be slow in some
configurations.

RESOLUTION
==========

A supported fix is now available from Microsoft, but it is only intended to
correct the problem described in this article and should be applied only to
systems experiencing this specific problem. This fix may receive additional
testing at a later time, to further ensure product quality. Therefore, if you
are not severely affected by this problem, Microsoft recommends that you wait
for the next Windows NT Server 4.0, Terminal Server Edition service pack that
contains this fix.

To resolve this problem immediately, contact Microsoft Product Support Services
to obtain the fix. For a complete list of Microsoft Product Support Services
phone numbers and information about support costs, please go to the following
address on the World Wide Web:

  http://support.microsoft.com/default.aspx?scid=fh;EN-US;CNTACTMS

NOTE: In special cases, charges that are normally incurred for support calls may
be canceled, if a Microsoft Support Professional determines that a specific
update will resolve your problem. Normal support costs will apply to additional
support questions and issues that do not qualify for the specific update in
question.

The English version of this fix should have the following file attributes or
later:

  Date       Time      Version   Size    File name  Platform
  -----------------------------------------------------------
  04/02/99   04:19pm   4.00      68816   Mup.sys    x86



STATUS
======

Microsoft has confirmed this to be a problem in Windows NT Server 4.0, Terminal
Server Edition.


Additional query words:

======================================================================
Keywords          :  
Technology        : kbWinNTsearch kbWinNT400search kbWinNTSsearch kbWinNTS400search kbNTTermServ400 kbNTTermServ400sp4 kbNTTermServSearch
Version           : winnt:4.0,4.0 SP4
Hardware          : ALPHA x86
Issue type        : kbbug
Solution Type     : kbfix

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