No message is included in alarm from ntevl probe.
The cause could be that the matched event had a following error on Event Viewer.
The description for Event ID ( <####> ) in Source (<application name>) could not be found. It contains the following insertion string(s): <the text of the message logged by ReportEvent>.
ntevl probe will not generate any message for alarm from such event.
The resolution is provided on Microsoft KB article below.
HOWTO: Troubleshooting the "Event Message Not Found" Message