[Xymon] EXTIME/TIME syntax

Attempting to prevent "false" cpu alarms during overnight processing, I have included a line in analysis.cfg thus: LOAD 4.0 6.0 HOST=blueteam EXTIME=W:2200:0400

However, alarms continue to be generated during the "excluded" hours.

Has anyone else had any difficulty with either TIME or EXTIME entries?

Thanks!