diff --git a/workflow/engine/controllers/installer.php b/workflow/engine/controllers/installer.php
index 47f89b525..10f910edf 100755
--- a/workflow/engine/controllers/installer.php
+++ b/workflow/engine/controllers/installer.php
@@ -1505,28 +1505,28 @@ class Installer extends Controller
                 $oCriteria->add( AddonsManagerPeer::ADDON_NAME, $namePlugin, Criteria::EQUAL );
                 $oDataset  = ApplicationPeer::doSelectRs( $oCriteria );
                 $oDataset->setFetchmode( ResultSet::FETCHMODE_ASSOC );
-                $oDataset->next();
-                $dataStore = $oDataset->getRow();
+                if ($oDataset->next()) {
+                    $dataStore = $oDataset->getRow();
+                    $ch = curl_init();
+                    $postData = array();
+                    $postData['action'] = "enable";
+                    $postData['addon']  = $namePlugin;
+                    $postData['store']  = $dataStore['STORE_ID'];
 
-                $ch = curl_init();
-                $postData = array();
-                $postData['action'] = "enable";
-                $postData['addon']  = $namePlugin;
-                $postData['store']  = $dataStore['STORE_ID'];
+                    curl_setopt($ch, CURLOPT_URL, "$serv/sys{$workspace}/{$lang}/{$skinName}/enterprise/addonsStoreAction");
+                    curl_setopt($ch, CURLOPT_HEADER, 0);
+                    curl_setopt($ch, CURLOPT_VERBOSE, 0);
+                    curl_setopt($ch, CURLOPT_COOKIEFILE, $cookiefile);
+                    curl_setopt($ch, CURLOPT_COOKIEJAR, $cookiefile);
+                    curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false);
+                    curl_setopt($ch, CURLOPT_POST, true);
+                    curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
+                    curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);
+                    curl_setopt($ch, CURLOPT_TIMEOUT, 90);
 
-                curl_setopt($ch, CURLOPT_URL, "$serv/sys{$workspace}/{$lang}/{$skinName}/enterprise/addonsStoreAction");
-                curl_setopt($ch, CURLOPT_HEADER, 0);
-                curl_setopt($ch, CURLOPT_VERBOSE, 0);
-                curl_setopt($ch, CURLOPT_COOKIEFILE, $cookiefile);
-                curl_setopt($ch, CURLOPT_COOKIEJAR, $cookiefile);
-                curl_setopt($ch, CURLOPT_FOLLOWLOCATION, false);
-                curl_setopt($ch, CURLOPT_POST, true);
-                curl_setopt($ch, CURLOPT_RETURNTRANSFER, true);
-                curl_setopt($ch, CURLOPT_POSTFIELDS, $postData);
-                curl_setopt($ch, CURLOPT_TIMEOUT, 90);
-
-                $output = curl_exec($ch);
-                curl_close($ch);
+                    $output = curl_exec($ch);
+                    curl_close($ch);
+                }
             }
         }
     }