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Article ID: 890671 - Last Review: September 11, 2011 - Revision: 3.0

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You may receive the following error messages when you synchronize Offline Files on a Microsoft Windows XP-based computer:
Offline files \\Server\\Share Error accessing '.' on 
Letter:  Files of this type can 
not be made available offline.Offline files \\Server\\Share Error 
accessing 'Subfolder' on \\Server\Share\Drive 
Letter:\.\TopFolder. The path is invalid.


This problem occurs because client-side caching (CSC) caches Timewarp client files and parses paths.


Hotfix Information

A supported hotfix is available from Microsoft. However, this hotfix is intended to correct only the problem that is described in this article. Apply this hotfix only to systems that are experiencing this specific problem. This hotfix might receive additional testing. Therefore, if you are not severely affected by this problem, we recommend that you wait for the next software update that contains this hotfix.

If the hotfix is available for download, there is a "Hotfix download available" section at the top of this Knowledge Base article. If this section does not appear, contact Microsoft Customer Service and Support to obtain the hotfix.

Note If additional issues occur or if any troubleshooting is required, you might have to create a separate service request. The usual support costs will apply to additional support questions and issues that do not qualify for this specific hotfix. For a complete list of Microsoft Customer Service and Support telephone numbers or to create a separate service request, visit the following Microsoft Web site: (
Note The "Hotfix download available" form displays the languages for which the hotfix is available. If you do not see your language, it is because a hotfix is not available for that language.


No prerequisites are required.

Restart requirement

You must restart the computer after you apply this hotfix.

Hotfix replacement information

This hotfix does not replace any other hotfixes.

File information

The English version of this hotfix has the file attributes (or later file attributes) that are listed in the following table. The dates and times for these files are listed in Coordinated Universal Time (UTC). When you view the file information, it is converted to local time. To find the difference between UTC and local time, use the Time Zone tab in the Date and Time tool in Control Panel.
Windows XP, x86-based versions with Service Pack 1
   Date         Time   Version            Size    File name
   28-Oct-2004  01:29  5.1.2600.1599      92,160  Cscdll.dll       
   26-Feb-2005  04:27  5.1.2600.1633     429,824  Mrxsmb.sys
   12-Oct-2004  16:22  5.1.2600.1599     170,112  Rdbss.sys
Windows XP, x86-based versions with Service Pack 2
   Date         Time   Version            Size    File name
   26-Feb-2005  04:06  5.1.2600.2620     451,584  Mrxsmb.sys


Microsoft has confirmed that this is a problem in the Microsoft products that are listed in the "Applies to" section.


For more information, click the following article number to view the article in the Microsoft Knowledge Base:
824684  ( ) Description of the standard terminology that is used to describe Microsoft software updates
kbautohotfix kbhotfixserver kbqfe kbbug kbfix KB890671
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