Parsing SOAP response in XML by javascript

I’m trying to create simple process with SOAP Service call in Camunda Modeler based on example
soap-service
Because the original service in the internet don’t work now, I write my own simple SOAP Service “Calculator” (in attachment) and try to call it.
SOAP Service is called successfully, but I received an Error message in stage of parsing SOAP Response (please look at screenshots).
Original SOAP Service response:

HTTP/1.1 200 OK
Date: Mon, 01 Oct 2018 12:11:20 GMT
Transfer-encoding: chunked
Content-type: text/xml; charset=utf-8

<?xml version="1.0" ?>
<S:Envelope xmlns:S="http://schemas.xmlsoap.org/soap/envelope/">
<S:Body>
<ns2:addResponse xmlns:ns2="http://myws/">
<return>7</return>
</ns2:addResponse>
</S:Body>
</S:Envelope>

My Output parameters in “Connector” tab where I try to get “return” value = 7:
Name:
return

Type:
Text

Value:
${S(response)
.childElement(“Body”)
.childElement(“http://myws/”, “addResponse”)
.childElement(“return”)
.textContent()}

Error Message in Camunda TaskList:
The process could not be started. : Cannot instantiate process definition MySuperCalculator:1:f5697362-c559-11e8-a93c-1831bf42b64c: Error while evaluating expression: ${S(response) .childElement("Body") .childElement("http://myws/", "addResponse") .childElement("return") .textContent()}. Cause: org.camunda.spin.xml.SpinXmlElementException: SPIN/DOM-XML-01007 Unable to find child element with namespace 'http://myws/' and name 'return'

Could you help me to understand what’s wrong ?
P.S. If you want to repeat my example, please, don’t forget to change URL to your own in Connector tab.
invokeCalculator2.bpmn (5.0 KB)

My found solution of parsing XML Array in javascript is in attachement.
Parse_XML_v03.bpmn (9.0 KB)

SOAP response:

javascript code:

    print('parsedStr =' + parsedStr);

    var arg0=S(parsedStr).xPath('string(/answer/arguments/arg0)').string();
    print('arg0=' + arg0);
    var arg1=S(parsedStr).xPath('string(/answer/arguments/arg1)').string();
    print('arg1=' + arg1);

    var method1=S(parsedStr).xPath('string(/answer/results/result[1]/method)').string();
    print('method1 = ' + method1);

    var result_id_33 = S(parsedStr).xPath("string(/answer/results/result[3]/@id)").string();
    print("result_id_33 = " + result_id_33 );

    var count=S(parsedStr).childElement("results").childElements("result").size();
    print('count=' + count);

    print("--------------------------===--------------------------------" );

    var i;
    for (i=0; i<count; i++)
    {
      var n=i+1;
      var param1="string(/answer/results/result[" +n+ "]/@id)";
      var param2="string(/answer/results/result[" +n+ "]/method)";
      var param3="string(/answer/results/result[" +n+ "]/amount)";

      print("n=" + n + " result id=" + S(parsedStr).xPath(param1).string() + "  method=" + S(parsedStr).xPath(param2).string() + "  amount=" + S(parsedStr).xPath(param3).string() );
    }
    var ResultCode = S(parsedStr).xPath("string(/answer/ServiceResult/ResultCode)").string();
    print("ResultCode = " + ResultCode );
    var ResultText = S(parsedStr).xPath("string(/answer/ServiceResult/ResultText)").string();
    print("ResultText= " + ResultText);

Output was:
------------------------- START FLOW --------------------------------------
------- Task_Print -------
===== param1=22
===== new param1=45
====-=-=-=-===== new param1=55
SOAPHeaders={Content-type=text/xml; charset=utf-8, Date=Thu, 18 Oct 2018 08:36:17 GMT, Transfer-encoding=chunked}
SOAPStatusCode=200
SOAPResponse=<?xml version="1.0" encoding="UTF-8"?><S:Envelope xmlns:S=“http://schemas.xmlsoap.org/soap/envelope/”>
<S:Body>
<ns2:fixedlistResponse xmlns:ns2=“http://myws/”>
<answer><arguments><arg0>20</arg0><arg1>4</arg1></arguments><results><result id=“1”><method>add</method><amount>24.0</amount></result><result id=“2”><method>div</method><amount>5.0</amount></result><result id=“33”><method>mult</method><amount>80.0</amount></result><result id=“44”><method>minus</method><amount>16.0</amount></result></results><ServiceResult><ResultCode>0</ResultCode><ResultText>Ok</ResultText></ServiceResult></answer>
</ns2:fixedlistResponse>
</S:Body>
</S:Envelope>

parsedStr =<answer><arguments><arg0>20</arg0><arg1>4</arg1></arguments><results><result id="1"><method>add</method><amount>24.0</amount></result><result id="2"><method>div</method><amount>5.0</amount></result><result id="33"><method>mult</method><amount>80.0</amount></result><result id="44"><method>minus</method><amount>16.0</amount></result></results><ServiceResult><ResultCode>0</ResultCode><ResultText>Ok</ResultText></ServiceResult></answer>
arg0=20
arg1=4
method1 = add
result_id_33 = 33
count=4
--------------------------===--------------------------------
n=1 result id=1  method=add  amount=24.0
n=2 result id=2  method=div  amount=5.0
n=3 result id=33  method=mult  amount=80.0
n=4 result id=44  method=minus  amount=16.0
ResultCode = 0
ResultText= Ok