SOAP receiver error

Hi All,

I am working on Asynchronous IDoc-PO-SOAP scenario. Getting the following error

Exception caught by adapter framework:SOAP:response message contains an error XIadapter/PARSING/ADAPTER.SOAP_EXCEPTION-soapfault:upload throable

Can you please advise the roor cause of error? In addition to that we do not want any kind of response from web service but still getting ,any idea why it might happen?

Thanks in advance