These errors are mentioned on the Deploy Software Updates for Office SharePoint Server 2007 right down the bottom.
The Error
Finding Cause
Look in the linked log and search for 'ERR' matching case.
04/16/2008 16:37:17 6 ERR Failed to upgrade SharePoint Products and Technologies.
Failed to upgrade SharePoint Products and Technologies. Further information regarding this failure can be found at C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\LOGS\Upgrade.log.
An exception of type Microsoft.SharePoint.PostSetupConfiguration.PostSetupConfigurationTaskException was thrown. Additional exception information: Failed to upgrade SharePoint Products and Technologies.
Microsoft.SharePoint.PostSetupConfiguration.PostSetupConfigurationTaskException: Exception of type 'Microsoft.SharePoint.PostSetupConfiguration.PostSetupConfigurationTaskException' was thrown.
at Microsoft.SharePoint.PostSetupConfiguration.UpgradeTask.Run()
at Microsoft.SharePoint.PostSetupConfiguration.TaskThread.ExecuteTask()
Looking at the log it I searched for 'ERROR' matching case:
[SPWebServerSequence] [ERROR] [4/16/2008 4:37:10 PM]: The access control list on C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\template\layouts\web.config could not be modified because the path could not be located in the file system.
The Resolution
Copy
C:\Program Files\Common Files\Microsoft Shared\Web Server Extensions\12\template\layouts\web.config file from Central APP Server to each APP and WFE server in same location
The Error
Finding Cause
Look in the linked log and search for 'ERR' matching case.
04/16/2008 16:53:34 8 ERR Exception: Microsoft.SharePoint.Administration.SPUpdatedConcurrencyException: An update conflict has occurred, and you must re-try this action. The object SPFarm Name=SharePoint_Config is being updated by CPMINING\SVC_MOSS_TST, in the OWSTIMER process, on machine PER1MOS02TST. View the tracing log for more information about the conflict.
at Microsoft.SharePoint.Administration.SPConfigurationDatabase.StoreObject(SPPersistedObject obj, Boolean storeClassIfNecessary, Boolean ensure)
at Microsoft.SharePoint.Administration.SPConfigurationDatabase.PutObject(SPPersistedObject obj, Boolean ensure)
at Microsoft.SharePoint.Administration.SPPersistedObject.Update()
at Microsoft.SharePoint.Administration.SPFarm.Update()
at Microsoft.SharePoint.PostSetupConfiguration.UpgradeTask.Run()
at Microsoft.SharePoint.PostSetupConfiguration.TaskThread.ExecuteTask()
The Resolution
Just rerun the wizard and it seems to work.