Idoc error events triggered twice

[Clucking]

Hi,

In a 740 0013 ERP system I have the situation that error events for inbound idocs are triggered twice when an idoc is not processed correctly.

E.g. event IDOCAPPL.INPUTERROROCCURRED is triggered twice for the same idoc or IDOCAPPL.INPUTERROROCCURRED is triggered twice for the same idoc.

Could someone please tell me where to stop one of the events from beeing raised?
I need the event for a custom workflow but this flow is of cause started twice when the event is raised twice.

Thanks

Claus.