--- services/servers/xmlrpc_server/xmlrpc_server.module
+++ services/servers/xmlrpc_server/xmlrpc_server.module
@@ -65,22 +65,20 @@
   $endpoint = services_get_server_info('endpoint', '');
   $controller = services_controller_get($method_name, $endpoint);
   
-  // Add in default arguments if arguments still dont exist.
-  if(is_array($controller['args'])) {
-    foreach($controller['args'] as $index => $arg) {
+  try {
+    // Add in default arguments if arguments still dont exist.
+    if(isset($controller['args']) && is_array($controller['args'])) {
+      foreach($controller['args'] as $index => $arg) {
       if($arg['optional'] && isset($arg['default value']) && !isset($args[$index])) {
         $args[$index] = $arg['default value'];
       } else {
-        if($arg['optional'] == FALSE) {
+        if($arg['optional'] == FALSE && !isset($args[$index])) {
           return services_error(t('Missing required argument @arg', array(
-              '@arg' => $arg['name'],
-            )), 401);
+        	'@arg' => $arg['name'],)), 401);
+          }
         }
       }
     }
-  }
-
-  try {
     return services_controller_execute($controller, $args);
   }
   catch (Exception $e) {