OK, is it that

1) the Event Viewer shows this message when you stop the service ?
2) this "error" is the cause for the stop?

If #1, then it is just a little bug that effects nothing, really. Some
service shells, like one of the Platform SDK samples, IIRC, use a global
variable that contains the last error for the thread. When the service
exits, it just uses the value of the last error. The service should call
SetServiceStatus() with a state of SERVICE_STOPPED and a value of NO_ERROR
as the last error code if it terminates cleanly.

If #2, then if you know where the error message is issued you can post a
_small_ extract of the code here. Someone will likely be able to help you.

Regards,
Will