SOAP-FILE-MAIL Asynchronous Scenario

HI Experts,

We have working on requirement like SOAP(Async)-File(Async)-Mail scenario. we are sending PO details from SOAP to file.if PI unable to create file at target side, we need to send a email notification to respective team with Invoice number and order number. but my scenario is asynchronous scenario. how we can handle this in PI. could please let me know your ideas.

Best Regards,

Sanjay.