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The Cisco Unity AvCsMgr.exe service crashes unexpectedly, and the voicemail system is not functional. The event log shows that the AvCsMgr.exe service crashes with no recovery, and the "AvCsMgr service terminated unexpectedly. The following corrective act

Core Issue

Heap corruption can cause the AvCsMgr.exe process to crash without any warning of problems. Termination of this process ceases all voicemail activities. In order to ascertain whether the issue is heap corruption, analyzation of the dumps logged by Dr. Watson is necessary. The Dr. Watson logs are located in C:\Documents and Settings\All Users\Documents\DrWatson. Collect the drwtsn32.log and user.dmp files.

These errors appear in the event log:

System log

Event Type: Error
Event Source: Service Control Manager
Event Category: None
Event ID: 7031
Date: 2/22/2006
Time: 3:03:01 PM
User: N/A
Computer: LAB-UNITY-404
The AvCsMgr service terminated unexpectedly.  It has done this 1 time(s). The following corrective action will be taken in 0 milliseconds: No action.

Event Type: Information
Event Source: DrWatson
Event Category: None
Event ID: 4097
Date: 2/22/2006
Time: 3:02:38 PM
User: N/A
Computer: LAB-UNITY-404
The application, AvCsMgr.exe, generated an application error The error occurred on 02/22/2006 @ 15:02:38.148 The exception generated was c0000005 at address 77F9D0EE (RtlIsValidIndexHandle)


This problem is tracked by Cisco bug ID CSCsb93268.

As a temporary fix, reboot the Cisco Unity server. But, the issue repeats itself.

This defect is fixed in the these Cisco Unity Engineering Special (ES) releases:

  • 4.02(0.087)

  • 4.0(4)ES107

  • 4.0(5)ES34

  • 4.0(5)ES43

  • 4.0(5)ES48

  • 4.0(5)ES55

  • 4.1(1)ES17

  • 4.2(0.90)

Refer to Cisco Unity 3.1(x) and 4.x: AvCsMgr Service Fails to Start for more information.

In order to obtain an appropriate ES patch, open a service request with Cisco Technical Support through the TAC Service Request Tool.

Version history
Revision #:
1 of 1
Last update:
‎06-22-2009 04:07 PM
Updated by: