It is an inbound scenario (Legacy-PI-ECC) in which we are using below parameters to post finance related data.
Adapter Type: IDoc_AAE
Adapter Type Software Component Version :SAP BASIS 7.40
We are using the above Adapter Configuration for both sender and receiver channel.
I could see some duplicate IDocs getting posted onto my ECC system from Legacy via PI.
I have checked the same in se16->edidc table, I found PI is also generating duplicate Message IDs for same Legacy IDoc, in turn, duplicate IDocs are generated for each PI message ID in ECC as well.
The duplicate IDocs are getting triggered and posted after 4 days of original IDoc getting triggered and posted.
Legacy has confirmed that the IDocs have not been triggered twice from their end.
Original IDocs were posted successfully (status 53) in the 1st go, so there is no point of retriggering the IDocs from Legacy end.
Need your help, at what end should we investigate to find out the actual root cause why is this happening.
Is there any check at PI level, where we can find out if the IDocs came twice in PI from Legacy so that we can troubleshoot accordingly, as access to Legacy system is out of scope for us.
Appreciate your help on this.