Microsoft small business knowledge base

Article ID: 967051 - Last Review: January 16, 2015 - Revision: 2.0

This article has been archived. It is offered "as is" and will no longer be updated.


The scan engines in Microsoft Forefront Security for Exchange Server do not update as expected. Additionally, the following error is logged in the ProgramLog.txt file:
ERROR: UpdateException: GetFileCommand failed on <scanengine.dll>. SybSync:UnzipFile CabException: Failed to extract the file(s) from 'C:\Program Files (x86)\Microsoft Forefront Security\Exchange Server\Data\Engines\x86\<ScanEngineName>\Bin\sybF2.tmp': 11: User aborted. CAB is readable. Failed to open 'C:\Program Files (x86)\Microsoft Forefront Security\Exchange Server\Data\Engines\x86\<ScanEngineName>\Bin\aveMicrosoft.dll'. Error: 13. File exists. Attribs:'RW'."

INFORMATION: The <ScanEngineName> scan engine has been rolled back.


This issue occurs because one of the scan engine update files contains a hidden attribute.


To work around this problem, follow these steps:
  1. In Windows Explorer, locate the following folder:
    C:\ProgramFiles (x86)\Microsoft Forefront Security\Exchange Server\Data\Engines\x86\<ScanEngineName>\Bin
    Note Make sure that hidden files are visible.
  2. Right-click the ave<ScanEngineName>.dll file.
  3. Click Properties, and then click to clear the Hidden check box.
  4. In Forefront Server Security Administrator, click the Update Now button under Scanner Updates to perform a manual update of the engine.


To resolve this problem, install Forefront Security for Exchange Server with Service Pack 2 (SP2).

For more information, click the following article number to view the article in the Microsoft Knowledge Base:
960465  ( ) Description of Forefront Security for Exchange Server with Service Pack 2

Applies to
  • Microsoft Forefront Security for Exchange Server Service Pack 1, when used with:
    • Microsoft Forefront Security for Exchange Server
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