Is this error anything to worry about?

Hi all,

We are seeing this error repeatedly in our admserv.log file under
epicor\oe100b_work. We are on Vantage 8.00.809f Progress. Is this
familiar to anyone?

Thanks in advance,
Erik Domingo
Advanced Electron Beams

[11/20/06 3:49:17 AM] [0] [ManagementPlugin] * Error processing
event: local.localhost:ID=NameServer-NULL Error occurred in server
thread; nested exception is:
[11/20/06 3:49:17 AM] [0] [ManagementPlugin] *
java.lang.NoClassDefFoundError:
com/sonicsw/mf/common/runtime/INotification (11491)