"System.FormatException: The string was not recognized as a valid DateTime" when running SharePoint Configuration Wizard step 9

Question

Dears,
We have a problem upgrading sharepoint
From: SharePoint 2007 SP2 12.0.0.6535 - April 10 cumulative Update
To: SharePoint 2007 SP2 12.0.6557.5000 - April 11 cumulative Update
We start installing WSS CU in our standalone environment
Then we start running the SharePoint Configuration Wizard and it is failed in step 9 with the following error in "PSCDiagnostics" log:
File reader could not understand line 15679. Line was: 06/26/2011 10:11:35  1  INF              Entering function PsconfigLinkLabel.LinkLabelClickedEventHandler. Error was: System.FormatException:
The string was not recognized as a valid DateTime. There is a unknown word starting
 at index 24.
 at System.DateTimeParse.Parse(String s, DateTimeFormatInfo dtfi, DateTimeStyles styles)
 at UlsGump.Column.TimeColumn.ParseTime(StringFacade timeString)
 at UlsGump.UlsEntry.SetEntryFromThread(StringFacade[] threadFacades, StringCacheFile stringCacheFile, Int64 messageLocation)
 at UlsGump.UlsEntry.ReadFromUlsBuffer(Char[] buffer, Int32 bufferStart, Int32 bufferCount, StringCacheFile stringCacheFile, Int64 fileStart)
 at UlsGump.FilePump.ReadJob()
 Please help and advise to solve this error in order to get upgrading sharepoint succeed
Regards, Anas N. Alhussein | Sharepoint Senior Developer

Answer 1

Hi,
From your narration, you can clear the configuration cache, then re-run the SharePoint Configuration Wizard, check the effect.
Cleared the cache of config database by following below steps.
1. Stopped the Windows SharePoint Services Timer service.
2. Started on the SharePoint Server where Central Administration Site is hosted. Browse to
C:\Documents and Settings\All Users\Application Data\Microsoft\SharePoint\Config\
3. Deleted all the xml files. (But do not delete the cache.ini file.)
4. Then Edited the cache.ini and replaced the current value with "1".
5. Restarted the Windows SharePoint Services Timer service on the Central Admin server .
Thanks,
Rock Wang
Forum Support
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Regards, Rock Wang Microsoft Online Community Support