Soap Webservice in Node JS - node.js

Question

I am trying to build a soap webservice in node js using the npm module soap. I am using the soap.listen function that is mentioned to launch a soap server in node js. The wsdl file I am including looks like below:
<?xml version="1.0" encoding="UTF-8"?>
<wsdl:definitions name="wscalc1" targetNamespace="http://localhost:8100/api/orderStatusWsdl" xmlns="http://localhost:8100/api/orderStatusWsdl" xmlns:http="http://schemas.xmlsoap.org/wsdl/http/" xmlns:soap="http://schemas.xmlsoap.org/wsdl/soap/" xmlns:wsdl="http://schemas.xmlsoap.org/wsdl/" xmlns:xs="http://www.w3.org/2001/XMLSchema">
<wsdl:message name="receiveOrderStatusRequest">
<wsdl:part name="a" type="xs:string"/>
<wsdl:part name="b" type="xs:string"/>
</wsdl:message>
<wsdl:message name="receiveOrderStatusResponse">
<wsdl:part name="orderStatusResponse" type="xs:string"/>
</wsdl:message>
<wsdl:portType name="orderStatusPort">
<wsdl:operation name="receiveOrderStatus">
<wsdl:input message="receiveOrderStatusRequest"/>
<wsdl:output message="receiveOrderStatusResponse"/>
</wsdl:operation>
</wsdl:portType>
<wsdl:binding name="orderStatusBinding" type="orderStatusPort">
<soap:binding style="rpc" transport="http://schemas.xmlsoap.org/soap/http"/>
<wsdl:operation name="receiveOrderStatus">
<soap:operation soapAction="receiveOrderStatus"/>
<wsdl:input>
<soap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" use="literal"/>
</wsdl:input>
<wsdl:output>
<soap:body encodingStyle="http://schemas.xmlsoap.org/soap/encoding/" use="literal"/>
</wsdl:output>
</wsdl:operation>
</wsdl:binding>
<wsdl:service name="orderStatusService">
<wsdl:port binding="orderStatusBinding" name="orderStatus">
<soap:address location="http://localhost:8100/api/orderStatusWsdl"/>
</wsdl:port>
</wsdl:service>
</wsdl:definitions>
The node js code:
var orderStatusWsdlXml = fs.readFileSync(path.join(__dirname, 'soap/wsdl/myWsdl2.wsdl'), 'utf8')
var soapServer = soap.listen(server, BASE_URL + '/orderStatusWsdl', orderStatusSoapService, orderStatusWsdlXml2)
soapServer.log = function(type, data) {
log.d('TYPE: ' + type)
log.d('DATA: ' + JSON.stringify(data, null, 4))
}
After running the node project I try to load the WSDL in SOAP UI client and I get the following error:
Error loading [http://localhost:8100/api/orderStatusWsdl]: org.apache.xmlbeans.XmlException: org.apache.xmlbeans.XmlException: error: Unexpected end of file after null
Where am I going wrong?