diff --git a/locallib.php b/locallib.php
index 593faa0e7beace7f6afd8b61d1f1087457337789..d0f3bbea942aa25497084057f6efd404f908eec6 100644
--- a/locallib.php
+++ b/locallib.php
@@ -435,6 +435,23 @@ function aconnect_get_content_folder($aconnect) {
   $folderscoid = aconnect_get_user_folder($aconnect, $folderscoid, $username); 
   return $folderscoid;
 }
+//
+// DFNVC
+//
+function aconnect_urlpath_exists($aconnect, $urlpath) {
+    $folderscoid = false;
+    $params = array('action' => 'sco-by-url',
+                    'url-path' => $urlpath,
+                    );
+    $aconnect->create_request($params);
+
+    if ($aconnect->call_success()) {
+        return true;
+    }
+    else {
+        return false;
+    }
+}
 
 /**
  * Log in as the admin user.  This should only be used to conduct API calls.
diff --git a/mod_form.php b/mod_form.php
index e6395171b6b15ad8e22fe3b9b66af35847d58cf7..66de3e92987caafafcc40bba6e6d87039a48a1fd 100644
--- a/mod_form.php
+++ b/mod_form.php
@@ -20,12 +20,11 @@ class mod_adobeconnect_mod_form extends moodleform_mod {
         global $COURSE, $CFG;
         $mform =& $this->_form;
 
-//-------------------------------------------------------------------------------
-    /// Adding the "general" fieldset, where all the common settings are showed
+        /// Adding the "general" fieldset, where all the common settings are showed
         $mform->addElement('header', 'general', get_string('general', 'form'));
 
 
-    /// Adding the standard "name" field
+        /// Adding the standard "name" field
         $mform->addElement('text', 'name', get_string('adobeconnectname', 'adobeconnect'), array('size'=>'64'));
         if (!empty($CFG->formatstringstriptags)) {
             $mform->setType('name', PARAM_TEXT);
@@ -35,7 +34,7 @@ class mod_adobeconnect_mod_form extends moodleform_mod {
         $mform->addRule('name', null, 'required', null, 'client');
         $mform->addRule('name', get_string('maximumchars', '', 255), 'maxlength', 255, 'client');
 
-    /// Adding the required "intro" field to hold the description of the instance
+        /// Adding the required "intro" field to hold the description of the instance
         $this->add_intro_editor(false, get_string('adobeconnectintro', 'adobeconnect'));
 
 //        $mform->addElement('htmleditor', 'intro', get_string('adobeconnectintro', 'adobeconnect'));
@@ -43,12 +42,11 @@ class mod_adobeconnect_mod_form extends moodleform_mod {
 //        $mform->addRule('intro', get_string('required'), 'required', null, 'client');
 //        $mform->setHelpButton('intro', array('writing', 'richtext'), false, 'editorhelpbutton');
 
-    /// Adding "introformat" field
+/// Adding "introformat" field
 //        $mform->addElement('format', 'introformat', get_string('format'));
-
 //-------------------------------------------------------------------------------
-    /// Adding the rest of adobeconnect settings, spreeading all them into this fieldset
-    /// or adding more fieldsets ('header' elements) if needed for better logic
+/// Adding the rest of adobeconnect settings, spreeading all them into this fieldset
+/// or adding more fieldsets ('header' elements) if needed for better logic
 
         $mform->addElement('header', 'adobeconnectfieldset', get_string('adobeconnectfieldset', 'adobeconnect'));
 
@@ -124,9 +122,9 @@ class mod_adobeconnect_mod_form extends moodleform_mod {
 
         // Search for a Meeting with the same starting name.  It will cause a duplicate
         // meeting name (and error) when the user begins to add participants to the meeting
+        //
         // DFNVC
         //
-        // $meetfldscoid = aconnect_get_folder($aconnect, 'meetings');
         $meetfldscoid = aconnect_get_meeting_folder($aconnect);
         //
         //
@@ -136,8 +134,6 @@ class mod_adobeconnect_mod_form extends moodleform_mod {
         if (empty($namematches)) {
             $namematches = array();
         }
-
-
         
         // Now search for existing meeting room URLs
         $url = $data['meeturl'];
@@ -149,23 +145,14 @@ class mod_adobeconnect_mod_form extends moodleform_mod {
             $errors['meeturl'] = get_string('invalidadobemeeturl', 'adobeconnect');
         }
 
-#        $filter = array('filter-like-url-path' => $url);
-#       DFNVC ERROR !!
-#
-        $filter = array('filter-url-path' => "/$url/");        
-        $urlmatches = aconnect_meeting_exists($aconnect, $meetfldscoid, $filter);
-        #$errors['meeturl'] = 'urlmatches:';
-
-        
         if (empty($urlmatches)) {
             $urlmatches = array();
-        } else {
-
+        }
+        else {
             // format url for comparison
             if ((false === strpos($url, '/')) or (0 != strpos($url, '/'))) {
                 $url = '/' . $url;
             }
-
         }
 
         // Check URL for correct length and format
@@ -177,9 +164,11 @@ class mod_adobeconnect_mod_form extends moodleform_mod {
             $errors['meeturl'] = get_string('invalidurl', 'adobeconnect');
         }
 
-        // Adding activity
-        if (empty($data['update'])) {
 
+        if (empty($data['update'])) {
+            //
+            // Adding activity
+            //
             if ($data['starttime'] == $data['endtime']) {
                 $errors['starttime'] = get_string('samemeettime', 'adobeconnect');
                 $errors['endtime'] = get_string('samemeettime', 'adobeconnect');
@@ -201,13 +190,10 @@ class mod_adobeconnect_mod_form extends moodleform_mod {
                 }
             }
 
-            foreach($urlmatches as $matchkey => $match) {
-                $matchurl = rtrim($match->url, '/');
-                if ($matchurl == $url) {
-                    $errors['meeturl'] = get_string('duplicateurl', 'adobeconnect');
-                }
+            if (aconnect_urlpath_exists($aconnect, $url)) {
+                $errors['meeturl'] = get_string('duplicateurl', 'adobeconnect');
             }
-
+            
         } else {
             // Updating activity
             // Look for existing meeting names, excluding this activity's group meeting(s)
@@ -229,14 +215,10 @@ class mod_adobeconnect_mod_form extends moodleform_mod {
                 }
             }
 
-            foreach($urlmatches as $matchkey => $match) {
-                if (!array_key_exists($match->scoid, $grpmeetings)) {
-                    if (0 == substr_compare($match->url, $url . '_', 0, strlen($url . '_'), false)) {
-                        $errors['meeturl'] = get_string('duplicateurl', 'adobeconnect');
-                    }
-                }
+            if (aconnect_urlpath_exists($aconnect, $url)) {
+                $errors['meeturl'] = get_string('duplicateurl', 'adobeconnect');
             }
-
+            
             // Validate start and end times
             if ($data['starttime'] == $data['endtime']) {
                 $errors['starttime'] = get_string('samemeettime', 'adobeconnect');