diff --git a/lib/client.js b/lib/client.js
index 129dce7e4..38432605d 100644
--- a/lib/client.js
+++ b/lib/client.js
@@ -120,7 +120,8 @@ Client.prototype._invoke = function(method, arguments, location, callback) {
       message = arguments;
     }
     else {
-        assert.ok(!style || style == 'document', 'invalid message definition for rpc style binding');
+        //Some APIs have no part definitions in AMC WSDL
+        assert.ok(!style || style == 'document' || !input.parts, 'invalid message definition for rpc style binding');
         message = self.wsdl.objectToDocumentXML(input.$name, arguments, input.targetNSAlias, input.targetNamespace);
     }
     xml = "<soap:Envelope " + 
@@ -160,4 +161,4 @@ Client.prototype._invoke = function(method, arguments, location, callback) {
     }, headers, options);
 }
 
-exports.Client = Client;
+exports.Client = Client;
\ No newline at end of file
diff --git a/lib/wsdl.js b/lib/wsdl.js
index dd90074d3..8386dcb4d 100644
--- a/lib/wsdl.js
+++ b/lib/wsdl.js
@@ -357,8 +357,11 @@ MessageElement.prototype.postProcess = function(definitions) {
             } else {
                 this.parts[part.$name] = part.$type;
             }
-            this.parts[part.$name].namespace = nsName.namespace;
-            this.parts[part.$name].xmlns = ns;
+            if(this.parts[part.$name]){
+                this.parts[part.$name].namespace = nsName.namespace;
+                this.parts[part.$name].xmlns = ns;                
+            }
+
             this.children.splice(i--,1);
         }
     }
@@ -733,15 +736,15 @@ WSDL.prototype.xmlToObject = function(xml) {
             topSchema = message.description(self.definitions);
             objectName = originalName;
         }
-				
-				if(attrs.href) {
-					id = attrs.href.substr(1);
-					if(!refs[id]) refs[id] = {hrefs:[],obj:null};
-					refs[id].hrefs.push({par:top.object,key:name});
-				}
-				if(id=attrs.id) {
-					if(!refs[id]) refs[id] = {hrefs:[],obj:null};
-				}
+                
+                if(attrs.href) {
+                    id = attrs.href.substr(1);
+                    if(!refs[id]) refs[id] = {hrefs:[],obj:null};
+                    refs[id].hrefs.push({par:top.object,key:name});
+                }
+                if(id=attrs.id) {
+                    if(!refs[id]) refs[id] = {hrefs:[],obj:null};
+                }
 
         if (topSchema && topSchema[name+'[]']) name = name + '[]';
         stack.push({name: originalName, object: obj, schema: topSchema && topSchema[name], id:attrs.id});
@@ -749,7 +752,7 @@ WSDL.prototype.xmlToObject = function(xml) {
     
     p.on('endElement', function(nsName) {
         var cur = stack.pop(),
-						obj = cur.object,
+                        obj = cur.object,
             top = stack[stack.length-1],
             topObject = top.object,
             topSchema = top.schema,
@@ -768,10 +771,10 @@ WSDL.prototype.xmlToObject = function(xml) {
         else {
             topObject[name] = obj;                        
         }
-				
-				if(cur.id) {			
-					refs[cur.id].obj = obj;
-				}
+                
+                if(cur.id) {            
+                    refs[cur.id].obj = obj;
+                }
     })
     
     p.on('text', function(text) {
@@ -801,15 +804,15 @@ WSDL.prototype.xmlToObject = function(xml) {
     if (!p.parse(xml, false)) {
         throw new Error(p.getError());
     }
-		
-		for(var n in refs) {
-			var ref = refs[n];
-			var obj = ref.obj;
-			ref.hrefs.forEach(function(href) {
-				href.par[href.key] = obj;
-			});
-		}
-		
+        
+        for(var n in refs) {
+            var ref = refs[n];
+            var obj = ref.obj;
+            ref.hrefs.forEach(function(href) {
+                href.par[href.key] = obj;
+            });
+        }
+        
     var body = root.Envelope.Body;
     if (body.Fault) {
         throw new Error(body.Fault.faultcode+': '+body.Fault.faultstring+(body.Fault.detail ? ': ' + body.Fault.detail : ''));
@@ -822,7 +825,7 @@ WSDL.prototype.objectToDocumentXML = function(name, params, ns, xmlns) {
     args[name] = params;
     return this.objectToXML(args, null, ns, xmlns);
 }
-
+//Code change for array elements handling
 WSDL.prototype.objectToRpcXML = function(name, params, namespace, xmlns) {
     var self = this,
         parts = [],
@@ -833,10 +836,26 @@ WSDL.prototype.objectToRpcXML = function(name, params, namespace, xmlns) {
     parts.push(['<',namespace,':',name,'>'].join(''));
     for (var key in params) {
         if (key != nsAttrName) {
+
             var value = params[key];
-            parts.push(['<',key,'>'].join(''));
-            parts.push((typeof value==='object')?this.objectToXML(value):xmlEscape(value));            
-            parts.push(['</',key,'>'].join(''));
+            if(Array.isArray(value)){
+                parts.push(['<',key,' arrayType="item[]"','>'].join(''));
+                for (var i = 0; i < value.length; i++) {
+                    if(Array.isArray(value[i])){
+                        parts.push('<item arrayType="item[]">');
+                    }else{
+                        parts.push('<item>');
+                    }
+                    parts.push((typeof value==='object')?this.objectToXML(value[i]):xmlEscape(value));  
+                    parts.push('</item>');
+                };
+                parts.push(['</',key,'>'].join('')); 
+            }else{
+                parts.push(['<',key,'>'].join(''));
+                parts.push((typeof value==='object')?this.objectToXML(value):xmlEscape(value));            
+                parts.push(['</',key,'>'].join(''));                
+            }
+
         }
     }
     parts.push(['</',namespace,':',name,'>'].join(''));
@@ -844,27 +863,38 @@ WSDL.prototype.objectToRpcXML = function(name, params, namespace, xmlns) {
     return parts.join('');
 }
 
+//Code change for array elements handling
 WSDL.prototype.objectToXML = function(obj, name, namespace, xmlns) {
+
     var self = this,
         parts = [],
         xmlnsAttrib = false ? ' xmlns:'+namespace+'="'+xmlns+'"'+' xmlns="'+xmlns+'"' : '',
         ns = namespace ? namespace + ':' : '';
-    
+
     if (Array.isArray(obj)) {
         for (var i=0, item; item=obj[i]; i++) {
-            if (i > 0) {
-                parts.push(['</',ns,name,'>'].join(''));
-                parts.push(['<',ns,name,xmlnsAttrib,'>'].join(''));
-            }
-            parts.push(self.objectToXML(item, name));
+            parts.push('<item>');
+            parts.push(self.objectToXML(item));
+            parts.push('</item>');
         }
     }
-    else if (typeof obj === 'object') {
+    else 
+        if (typeof obj === 'object') {
         for (var name in obj) {
             var child = obj[name];
-            parts.push(['<',ns,name,xmlnsAttrib,'>'].join(''));
-            parts.push(self.objectToXML(child, name));
-            parts.push(['</',ns,name,'>'].join(''));
+            
+            if(Array.isArray(child)){
+                name ? parts.push('<'+name+' arrayType="item[]">'): parts.push('<item arrayType="item[]">');
+                parts.push(self.objectToXML(child));
+                name ? parts.push('</'+name+'>'): parts.push('</item>');
+
+            }else{
+                parts.push(['<',ns,name,xmlnsAttrib,'>'].join(''));
+                parts.push(self.objectToXML(child));
+                parts.push(['</',ns,name,'>'].join(''));
+            }
+            
+            
         }
     }
     else if (obj) {
diff --git a/package.json b/package.json
index 27129aa6f..4d879ab86 100644
--- a/package.json
+++ b/package.json
@@ -5,7 +5,7 @@
     "engines": { "node": ">=0.8.0" },
     "author": "Vinay Pulim <v@pulim.com>",
     "dependencies": {
-        "node-expat": ">=1.6.1",
+        "node-expat": "~1.6.1",
         "request": ">=2.9.0"
     },
     "repository" : {