error can be eliminated the following way:
•Stop the Administration server service.
•Delete the CS Admin Kit.msc file in the following folder:
◦С:Users\AppDataRoamingMicrosoftMMC in Windows Vista, 7, 2008.
◦C:Documents and Settings\Application DataMicrosoftMMC in Windows XP.
•Start the Administration server service after deleting the file.
All the data on client hosts, groups, tasks and policies will be preserved.