Hi Enrico
one of them is the document and one is the Idoc) and go to the Idoc part then I see Error message 29 in the status.
From the description of your issue, it looks like the IDoc was not sent out successfully. Can you double click into the error message and see if there are further information on the error. Can you also please share a screenshot of the error?
On the SAP PI side in transaction BD87 I can’t see any incoming Idocs.
You will not be able to see the IDoc in BD87 on PI side even if it is transmitted successfully. It would go through the IDoc adapter on PI side which will convert it into an XML message. You should check instead in IDX5 with the IDoc number from your ECC system.
Rgds
Eng Swee