Source:  TIMESYNC.NLM

Explanation:  The Synchronization Radius parameter is set to a value lower than the current correction floor setting for the TIMESYNC.NLM. The default synchronization radius is 2000 milliseconds; the default correction floor setting is 1 millisecond. (The correction floor parameter can be changed, though normally it should not be.)

Action:  Set the Synchronization Radius parameter to a value higher than the correction floor setting. A value of 1000-2000 milliseconds (1-2 seconds) or higher is usually adequate.