Middle ware to SAP - message not received

Hi Team

Right now we are testing with Process message PI_CONS.

Action : In Middleware they mapped the values from MES to FM PROCESS_MES_UPLOAD. This FM is all about Characteristics & Its Value which will be mapped with XML structure fields from MES .

Issue : From Middleware side they Triggered the Process message but message is not received in SAP.

Question 1 : Do we have any check points to get the message in SAP from Middle ware. As per middleware Team they triggered the message successfully.

Question 2: In FM PROCESS_MESS_UPLOAD , we have ATNAM & ATWRT . these Two fields are mapped multiple time in Middleware ( mapped to Batch , Process order , Qty.. and with its corresponding value).So I had a doubt while executing this FM manually in SE37 , how the multiple characristics & Its values will be passed in to this ATNAM & ATWRT to reach the Destination… Is the approach correct one ?

Please let me know if you need any more input about the issue.

Thanks

Uday