Invalid event occurred
An invalid event occurred for the current state of the trombone operation. This might happen if you have customized the default state tables and the order of the operations needed to complete a trombone is now incorrect.
Check that the state tables implementing the trombone are doing this correctly (the default state tables should be used as a guide to correct operation).
If the problem persists, re-create the problem and take an AIX system trace (specify the -d command-line parameter for the custom server), before calling Blueworx Support. Also be prepared to give details of any customization that has been made to the default trombone state tables.
Yellow (error id = 20503)
Log, System Monitor.