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Virtualized applications fail to launch and generate 00-000000C3 errors in sftlog.txt

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Symptoms

On Windows Server 2008 R2 SP1 Remote Desktop Services (RDS) servers running the App-V RDS client version 4.6.1.30151 and Forefront Endpoint Proection (FEP) Malware version 3.X, App-V applications stop working after 2-3 days and a reboot is required to restore App-V functionality. The following error may also be logged in the App-V client's sftlog.txt file:

[12/06/2012 11:18:21:968 INTF ERR] {tid=1194}
The Application Virtualization Client has encountered a serious error.  All applications
deployed through the Application Virtualization Client have been terminated.  Please stop the
Client, copy the sftfs.etl file in the installation directory to a safe
place, and contact Technical Support.

[12/06/2012 11:18:22:077 TRAY ERR] {tid=5368:usr=JohnB}
Snagit 10 10.0.0.788

An unexpected error occurred. Report the following error code to your System Administrator.
Error code: 46175B3-00000000-000000C3

NOTE Non-App-V applications are unaffected.

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Cause

This can occur if the Forefront Endpoint Protection (FEP) Malware program MsMPEng.exe is scanning the App-V client's virtual drive. By default this is the Q: drive but it could be any drive configured during App-V client installation.

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Resolution

To resolve this issue, update the FEP agent to Version 4.1.522.0 or higher and verify that the App-V virtual drive (Default is Q:) is defined in the FEP exclusion policy. Use the steps outlined in the More Information section to verify with Process Monitor that MsMpEng.exe is no longer scanning the Q: drive. For example, if FEP is monitoring the Q: drive you will see entries similar to the following:

7:34:08.3177871 PM MsMpEng.exe 832 ReadFile Q:\defapp\DefaultApp.exe SUCCESS Offset: 32,768, Length: 32,768, I/O Flags: Non-cached, Paging I/O, Synchronous Paging I/O, Priority: Normal
7:34:08.3179787 PM MsMpEng.exe 832 ReadFile Q:\defapp\DefaultApp.exe SUCCESS Offset: 65,536, Length: 32,768, I/O Flags: Non-cached, Paging I/O, Synchronous Paging I/O, Priority: Normal
7:34:08.3185970 PM MsMpEng.exe 832 ReadFile Q:\defapp\DefaultApp.exe SUCCESS Offset: 98,304, Length: 32,768, I/O Flags: Non-cached, Paging I/O, Synchronous Paging I/O, Priority: Normal


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More Information

How to run Process Monitor (ProcMon) inside the App-V virtual environment: http://blogs.technet.com/b/appv/archive/2012/04/24/how-to-run-process-monitor-procmon-inside-the-app-v-virtual-environment.aspx.

2576031 Recommended antivirus or antimalware exclusions when troubleshooting Application Virtualization (App-V) client issues
http://support.microsoft.com/kb/2576031/EN-US)

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Keywords: kb

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Article Info
Article ID : 2792121
Revision : 2
Created on : 3/27/2020
Published on : 3/27/2020
Exists online : False
Views : 365