There are two ways to handle exceptions in a rule set:
A hybrid approach is generally the best strategy. Implement the resulting event exception handler where detailed context information is needed but provide a root event exception handler for all other exceptions.
Prior to Prinergy 6, if both exception handlers were implemented both would be executed. The resulting event exception handler rule chain would be executed and then the root event exception handler rule chain would be executed. This would sometimes result in duplicate error reporting. As of Prinergy 6, the exception handling behavior has changed. Now only if a resulting event exception handler is not implemented on the action does the root event exception handler execute. In order to allow you to replicate the old behavior, a Throw action has been added in to allow you to propagate exceptions from the resulting event exception handler to the root exception event handler.
Note: As of Prinergy 6.1.1, the Throw action is not working correctly due to bug PRINERGY-34294. Attempting to place it in a rule set causes Rule Builder to crash.