I have done a small ruby app to consume a web service on SUN App Server.
But I have an error when running the app.

here is the code:

require 'soap/rpc/driver'

driver = SOAP::RPC::Driver.new( 
'http://localhost:8085/helloservice/HelloService', 
'urn:http://endpoint.helloservice/')

driver.add_method('sayHello')
puts driver.sayHello

the error message i get:

: Cannot find the dispatch method (SOAP::FaultError)

can someone help in identifying the right parameters.

my WSDL

<?xml version="1.0" encoding="UTF-8"?><definitions 
xmlns="http://schemas.xmlsoap.org/wsdl/" 
xmlns:tns="http://endpoint.helloservice/" 
xmlns:xsd="http://www.w3.org/2001/XMLSchema" 
xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" 
targetNamespace="http://endpoint.helloservice/" name="HelloService">
  <types>
    <xsd:schema>
      <xsd:import namespace="http://endpoint.helloservice/" 
schemaLocation="http://localhost:8085/helloservice/HelloService/__container$publishing$subctx/WEB-INF/wsdl/HelloService_schema1.xsd" 
xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" 
xmlns:soap12="http://schemas.xmlsoap.org/wsdl/soap12/"/>
    </xsd:schema>
  </types>
  <message name="sayHello">
    <part name="parameters" element="tns:sayHello"/>
  </message>
  <message name="sayHelloResponse">
    <part name="parameters" element="tns:sayHelloResponse"/>
  </message>
  <portType name="Hello">
    <operation name="sayHello">
      <input message="tns:sayHello"/>
      <output message="tns:sayHelloResponse"/>
    </operation>
  </portType>
  <binding name="HelloPortBinding" type="tns:Hello">
    <soap:binding transport="http://schemas.xmlsoap.org/soap/http" 
style="document"/>
    <operation name="sayHello">
      <soap:operation soapAction=""/>
      <input>
        <soap:body use="literal"/>
      </input>
      <output>
        <soap:body use="literal"/>
      </output>
    </operation>
  </binding>
  <service name="HelloService">
    <port name="HelloPort" binding="tns:HelloPortBinding">
      <soap:address 
location="http://localhost:8085/helloservice/HelloService" 
xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" 
xmlns:soap12="http://schemas.xmlsoap.org/wsdl/soap12/"/>
    </port>
  </service>
</definitions>
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