This document describes how to troubleshoot Cisco Unity Media Master
Control Bar Issues.
There are no specific requirements for this document.
The information in this document is based on Cisco Unity 5.X,
The information in this document was created from the devices in a
specific lab environment. All of the devices used in this document started with
a cleared (default) configuration. If your network is live, make sure that you
understand the potential impact of any command.
Technical Tips Conventions for more information on document
You are not able to manage media files with Media Master Control Bar
and the Media Master Control Bar does not function properly. The pane is blank
with a small red "x" that indicates this section did not load.
When you try to access Cisco Unity PCA, the Login failed
because the Cisco PCA MediaMaster was not found error message
appears. However, the AvMediaMasterCtrl class
does appear in the Downloaded Program Files folder, and if it is deleted, it
Complete these steps in order to resolve this issue:
Note: All these steps require an Administrator account.
Obtain the cab file from Cisco Unity:
Extract the cab file.
Copy these five files to the C:\WINNT\system32
Copy these two files to %SystemRoot%\Downloaded Program
Note: The Downloaded Program Files folder is a system
folder, so the copy operation is not allowed in a Microsoft Windows Explorer
window. It is allowed in a DOS prompt window with the
copy command when you use an administrative
Issue the regsvr32 /s
avmediamasterctrl.ocx command in the command prompt of the PC in
order to register the ActiveX control to Microsoft Internet
The Media Master Control Bar works now.
Enter http://<IP Address>/CiscoPCA
as the URL, and install the Active X control from CiscoPCA rather than from the
Copy MediaMasENU.cab from
CommServer\Web, and replace the version of that
file already present in that destination directory.
This issue is also documented in Cisco Bug ID
(registered customers only)
With Cisco Unity, the Media Master Control Bar displays this error:
The specified server cannot be found.
This issue can occur if the Media Master Control Bar settings use a
Cisco Unity Admin account instead of Cisco Unity Server name or IP address. In
order to resolve the issue, make sure that the Media Master Control Bar
settings use the correct server name or IP address of the Cisco Unity
There is an Active-X issue with the Cisco Unity Admin web page. The
pca page does not download the new media master .cab file. This error message
appears: Windows has blocked this software because it can’t
verify the publisher MediaMasENU.cab
The issue is mentioned in Cisco bug ID
(registered customers only)
Complete these steps in order to workaround this issue:
Choose Tools > Internet Options in Microsoft
Click the Security tab, and select Local
Click Custom Level. This window
For Download unsigned ActiveX controls, change
Disable to Enable.
This allows IE to install the mediamas.cab the next time when the