diff --git a/application/startup.inc.php b/application/startup.inc.php
index af4824a83..f5c2b54ba 100644
--- a/application/startup.inc.php
+++ b/application/startup.inc.php
@@ -15,10 +15,7 @@
 //
 //   You should have received a copy of the GNU Affero General Public License
 //   along with iTop. If not, see <http://www.gnu.org/licenses/>
-use Combodo\iTop\Application\EventRegister\ApplicationEvents;
 use Combodo\iTop\Application\Helper\Session;
-use Combodo\iTop\Service\Events\EventData;
-use Combodo\iTop\Service\Events\EventService;
 
 require_once(APPROOT.'core/cmdbobject.class.inc.php');
 require_once(APPROOT.'application/utils.inc.php');
@@ -103,6 +100,3 @@ else
 }
 $sConfigFile = APPCONF.$sEnv.'/'.ITOP_CONFIG_FILE;
 MetaModel::Startup($sConfigFile, false /* $bModelOnly */, $bAllowCache, false /* $bTraceSourceFiles */, $sEnv);
-// Event service must be initialized after the MetaModel startup, otherwise it cannot discover classes implementing the iEventServiceSetup interface
-EventService::InitService();
-EventService::FireEvent(new EventData(ApplicationEvents::APPLICATION_EVENT_METAMODEL_STARTED));
diff --git a/core/metamodel.class.php b/core/metamodel.class.php
index d3b531e2f..66606ab69 100644
--- a/core/metamodel.class.php
+++ b/core/metamodel.class.php
@@ -17,7 +17,10 @@
 //   along with iTop. If not, see <http://www.gnu.org/licenses/>
 //
 
+use Combodo\iTop\Application\EventRegister\ApplicationEvents;
 use Combodo\iTop\Core\MetaModel\FriendlyNameType;
+use Combodo\iTop\Service\Events\EventData;
+use Combodo\iTop\Service\Events\EventService;
 
 require_once APPROOT.'core/modulehandler.class.inc.php';
 require_once APPROOT.'core/querymodifier.class.inc.php';
@@ -6343,36 +6346,37 @@ abstract class MetaModel
 	{
 		self::$m_sEnvironment = $sEnvironment;
 
-		if (!defined('MODULESROOT'))
-		{
-			define('MODULESROOT', APPROOT.'env-'.self::$m_sEnvironment.'/');
+		try {
+			if (!defined('MODULESROOT')) {
+				define('MODULESROOT', APPROOT.'env-'.self::$m_sEnvironment.'/');
 
-			self::$m_bTraceSourceFiles = $bTraceSourceFiles;
+				self::$m_bTraceSourceFiles = $bTraceSourceFiles;
 
-			// $config can be either a filename, or a Configuration object (volatile!)
-			if ($config instanceof Config)
-			{
-				self::LoadConfig($config, $bAllowCache);
-			}
-			else
-			{
-				self::LoadConfig(new Config($config), $bAllowCache);
+				// $config can be either a filename, or a Configuration object (volatile!)
+				if ($config instanceof Config) {
+					self::LoadConfig($config, $bAllowCache);
+				} else {
+					self::LoadConfig(new Config($config), $bAllowCache);
+				}
+
+				if ($bModelOnly) {
+					return;
+				}
 			}
 
-			if ($bModelOnly)
-			{
-				return;
+			CMDBSource::SelectDB(self::$m_sDBName);
+
+			foreach (MetaModel::EnumPlugins('ModuleHandlerApiInterface') as $oPHPClass) {
+				$oPHPClass::OnMetaModelStarted();
 			}
+
+			ExpressionCache::Warmup();
+		}
+		finally {
+			// Event service must be initialized after the MetaModel startup, otherwise it cannot discover classes implementing the iEventServiceSetup interface
+			EventService::InitService();
+			EventService::FireEvent(new EventData(ApplicationEvents::APPLICATION_EVENT_METAMODEL_STARTED));
 		}
-
-		CMDBSource::SelectDB(self::$m_sDBName);
-
-        foreach(MetaModel::EnumPlugins('ModuleHandlerApiInterface') as $oPHPClass)
-        {
-            $oPHPClass::OnMetaModelStarted();
-        }
-
-		ExpressionCache::Warmup();
 	}
 
 	/**