Did you ever resolve this? If so, how?
I am fighting what I think is the same issue....

Troy

>I'm calling a web service which requires a parameter of type "s:hexBinary" according to their WSDL. The parameter label is "EncodedData"
>
>When I try to send the parameter as a string from VFP I get the client error: "Type conversion failure for element EncodedData"
>
>Any idea how I can get around this?
>
>TIA