IDOC not delivered to PO System, SEGMENT_UNKNOWN Error in SM58

Hello All,

We are trying to send an IDOC from 4.6C R/3 System to PO System. It is working fine in other 4.6C System except one where IDOC is not reaching PO System. The Status of Outbound IDOC is '03 - Data Passed to Port OK', but we see an error SM58 as shown in the attachment.

Could anyone please help me resolve this error. What I also understand is Function Module IDOC_INBOUND_ASYNCHRONOUS is called at the receiving System to process inbound idoc. So it is also not clear is this error  is occurring at the receiving system or at the sending system?

Thanks & Regards,

Rohit