PROBLEM: PmScreen.exe message "OLE class MBServer is not registered"

PROBLEM:PmScreen.exe error "OLE class MBServer is not registered".

Last reviewed: December 13, 2011
Article ID: 041208sab

The information in this article applies to:

PMScreen, PMWave, PMMeter and other Power Master Logger utilities on all platforms.

Symptoms

When starting PmScreen.exe or one of the other Power Master utilities the following error messages appear:

"The OLE class MBServer is not registered on this computer"

"An operation was attempted on a nonexistent network connection"

Cause (all Platforms).

The registration information for MBServer.exe is missing or has become invalid. This can occur if the file MBServer.exe has been moved or deleted from the computer.

MBServer.exe is the communication manager for various Power Master Tools, such as PMScreen, PMWave, PMMeter etc.

Cause (Windows Vista and Windows 7 only).

When PmScreen is run for the first time MbServer is not (yet) registered so PmScreen attempts to register it automatically. When running under a restricted or normal user account on Windows Vista or Windows 7, PmScreen does not have the required access rights to register MbServer into the system.

Resolution (Windows Vista and Windows 7)

Allow PmScreen to run with elevated rights once by following these steps:

Right click on PmScreen.exe, select "Run As" from the dropdown menu and then choose <Administrator>. This should allow PmScreen to register MbServer successfully.
On subsequent uses of PmScreen you can run PmScreen as a normal user.

Resolution (all Platforms)

Solution: Force MBServer.exe to re-enter its registration information in the system registry.

Follow the steps below:

Click on Start on the taskbar then select Run (or press the Windows Key and <R>).
Click on Browse.
In the Browse dialog, navigate to the directory in which PmScreen.exe and Pronto was installed. Locate MBServer.exe and click on open.
In the Run dialog edit the command line so that it reads:
<drive><directory>\MBSERVER.EXE /REGSERVER
where <drive><directory> is the folder in which MBServer.exe resides.
Click on OK. MBServer.exe will run, re-enter its registration information then exit.
PMScreen.exe should now function correctly.

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