>>>There appears to be a control character on the 13th line. Could that be it?
>>
>>I have converted that line to an empty string and it doesn't change anything. There is something else.
>
>Well, it turned out that it was indeed that line. The box character is creating the problem. I am looking for its equivalent to replace that. But, this brings an interesting question. What's the proper way of making sure no other characters like that create a problem in SOAP?

I dont know for special chars...
But i think you may replace restricted chars in the
return string like the "less than" and "greater than"
to avoid the case where your closing sequence will be
in the string like this </return>

:-)