IDoc status 60 (Syntax Error) - Workflow event not triggered

Dear experts,

We have created a custom workflow based on the business object IDOCAPPL.

The workflow is triggered when the event INPUTERROROCCURRED is triggered. This works fine for most IDoc statusses.

However, when an IDoc with syntax error is created (status 60), this event is not triggered.

Is there any way to customize this?

Thanks.