Soap Response in pub.client:soapHTTP

When I make a request to the webservice using pub.client:soapHTTP, I get back a soapStatus of 1 and
soapResponseData as:

<?xml version="1.0" ?>soapenv:Serverjava.lang.NullPointerException

Do you know why faultCode is “soapenv:Server”? Is this not supposed to be “1” (soapStatus)?

Thanks!