Before Mapping Function for Inbound Idoc interface

Hi,

We are in the process of configuring and setting up few inbound idoc interfaces using AIF.

And our requirement is to have few actions \ steps performed before the actual mapping takes place.

We have been trying to use the 'Before Mapping' function available in the interface definition, but it seems that the FM does not get executed automatically every time an idoc comes in, neither does it get executed after restarting a failed message.

But the FM does seem to be getting invoked when we manually transform the inbound message in the technical mode in /aif/err.

We have also tried assigning the required FM in the 'Before Mapping' function available under structure mapping, but still no joy.

Kindly let Me know if there are any pointers to get the FM invoked automatically before the actual mapping occurs.

Thanks,

Sagar J.