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Important This article contains information about how to modify the registry. Make sure that you back up the registry before you modify it. Make sure that you know how to restore the registry if a problem occurs. For more information about how to back up, restore, and modify the registry, click the following article number to view the article in the Microsoft Knowledge Base:
VSS aware backup applications may experience a failure of the Event Log Writer. The exact error will depend on the backup program used
When the 64-bit System Center Operations Manager 2007 agent is installed on a 64-bit Windows 2003 server, it does not properly identify the full path to the Operations Manager event log in the registry.
For example, when this happens the registry key below will contain a value of Config\MOMLog.evt:
Since the value does not contains the full path to the actual event log file it can cause backup programs (such as Tivoli Storage Manager agent) to fail when backing up the event log.
Warning Serious problems might occur if you modify the registry incorrectly by using Registry Editor or by using another method. These problems might require that you reinstall the operating system. Microsoft cannot guarantee that these problems can be solved. Modify the registry at your own risk.
To resolve this issue, manually change the registry value to reflect the correct, full path to the MOMLog.evt file (e.g. C:\windows\system32\Config\MOMLog.evt).
Note If you keep the File key type REG_SZ, you must use the complete, actual full path of the EVT file. Variables such as %systemroot% will not work because they are not expandable, and this may cause problems.
If you want to use environment variables such as %systemroot%, you have to delete the File key and create a new File key of type REG_EXPAND_SZ. For more information about these key types, click the following article number to view the article in the Microsoft Knowledge Base:
(http://support.microsoft.com/kb/101230/ )Definition of Registry Value Data Types
For more information, see http://blogs.technet.com/operationsmgr/archive/2009/04/02/opsmgr-2007-backup-programs-may-fail-to-backup-event-log-on-x64-scom-agent.aspx
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