OpenLayers WPS function fails in IE

Question

I am making a WPS call in OpenLayers which works successfully in Chrome and Firefox but not in IE9. The response from IE tells me

"Process failed during execution\nCould not convert to target type com.vividsolutions.jts.geom.Geometry"

The same code returns intersecting polygons in both other browsers so I think it's down to how IE handles my GML/XML. Can anyone help out?

Code as follows:

function wpsExecute(featureA, featureB, identifier) {

var polygonElement;
if (BrowserInfo.browser == "Chrome") {
    polygonElement = "Polygon"
} else {
    polygonElement = "gml:Polygon"
}

// set up the process specific parameters
var options = {
    // set the wps process
    identifier : identifier,
    dataInputs : [ {
        identifier : "a",
        data : {
            complexData : {
                attributes : {
                    mimeType : "text/xml",
                    subtype : "gml/3.1.1"
                },
                // get the gml:Polygon node from the xml DOM
                value : featureA.getElementsByTagName(polygonElement)[0]
            }
        }
    }, {
        identifier : "b",
        data : {
            complexData : {
                attributes : {
                    mimeType : "text/xml",
                    subtype : "gml/3.1.1"
                },
                // get the gml:Polygon node from the xml DOM
                value : featureB.getElementsByTagName(polygonElement)[0]
            }
        }
    } ],
    responseForm : {}
};

var format = new OpenLayers.Format.WPSExecute();
// console.log(format.write(options));

try {

    OpenLayers.Request.POST({
        url : WPS_URL,
        data : format.write(options),
        async : false,
        success : parseExecute,
    });

WHERE featureA and featureB are as follows:

var gmlOptions = {
    featureType : "feature",
    featureNS : "http://example.com/feature"
};

// new gml 3 format
var gml3 = new OpenLayers.Format.GML.v3(gmlOptions);


compareFeatureGml = gml3.write(compareFeature);

var xmlFormat = new OpenLayers.Format.XML();
var featureB = xmlFormat.read(compareFeatureGml);

Thank you all!

Answer 1

The problem was with Format.XML. I had to redeclare a new XML format everytime I made a wps call.

var xmlFormat = new OpenLayers.Format.XML();
//read gml feature as xml
var xmlfeature = xmlFormat.read(gmlFeature);

Also, ie cannot use XMLSerializer...

    // this fails in IE
    var xmlSerializer = new XMLSerializer();
    var featureString = xmlSerializer.serializeToString(gmlFeature);