GP: How to keep action  sleeping until ABAP function module raises event

Hello experts,
I'd like to develop a gp process which contains a callable objects which keeps the process instance waiting until an abap function module send something like an event.
I don't want to put too much load on the machine and block expensive JCO ressources.
Does anyone have an idea how to solve this?
Thanks very much
Stefan

Hi Mike,
GREAT! Many thanks! Sometimes solutions may be so simple.
For all others who have the same problem a bit more in detail:
In your FM just enter as exception: CX_BO_ACTION_CANCELLED and mark 'Exceptn. Classes'.
Declare your class method with the exception cx_bo_action_cancelled.
In your class method just enter your FM via the 'Pattern'-Button.
The Pattern will show only the Import- and Export-Parameters but not the exception (class).
Regards,
Georg

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