In Microsoft Forefront Security for SharePoint, scan engines are not updated, and the following error is logged in the ProgramLog.txt file:
ERROR: A standard exception was caught in GetEngineFiles. Invalid string position
To resolve this issue, install Forefront Security for
SharePoint with Service Pack 3 (SP3).
For more information, click the following article number to view the article in the Microsoft Knowledge Base:
Description of Forefront Security for SharePoint with Service Pack 3
has confirmed that this is a problem in the Microsoft products that are listed
in the "Applies to" section.