MESSAGE_LEVEL:
Set to 0, 5, 10, 15, 20, 25 to suppress all messages with severity below this level. The default level is 0. Messages with a level higher than 25 cannot be suppressed. See the "Forms Error Messages Manual" for more details about the various MESSAGE_LEVEL's:
1. 0 - Default value. All types of messages from the other levels of severity.
2. 5 - Reaffirms an obvious condition.
3. 10 - Indicates that the operator has made a procedural mistake.
4. 15 - Declares that the operator is attempting to perform a function for which the form is not designed.
5. 20 - Indicates a condition where the operator cannot continue an intended action due to a problem with a trigger or another outstanding condition.
6. 25 - Indicates a condition that could result in the form performing incorrectly.
7. >25 - Indicates a message severity level that you cannot suppress via the SYSTEM.MESSAGE_LEVEL system variable.
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