I have a simple pass through synchronous scenario wherein standard enterprise service have been used.
It is a SOAP-->PI-->ECC (Proxy) synchronous call.
The response XML of few Sales orders contain characters like  which are un-parseable by UTF-8 encoding.
Hence, I am getting an error: "Character reference "&#x1A" is an invalid XML character".
I tried to changed the Endpoint in SOAP UI by appending the attribute "&xmlenc=iso-8859-1" , but the error still persists: