// Disable content of stocks tab if advanced stock management is not activated

controllers/admin/AdminStockInstantStateController.php

@@ -442,5 +442,25 @@ class AdminStockInstantStateControllerCore extends AdminController
 			}
 		}
 	}
+	
+	public function initContent()
+	{
+		if (!Configuration::get('PS_ADVANCED_STOCK_MANAGEMENT'))
+		{
+			$this->warnings[md5('PS_ADVANCED_STOCK_MANAGEMENT')] = $this->l('You need to activate advanced stock management prior to use this feature.');
+			return false;
+		}
+		parent::initContent();
+	}
+	
+	public function initProcess()
+	{
+		if (!Configuration::get('PS_ADVANCED_STOCK_MANAGEMENT'))
+		{
+			$this->warnings[md5('PS_ADVANCED_STOCK_MANAGEMENT')] = $this->l('You need to activate advanced stock management prior to use this feature.');
+			return false;
+		}
+		parent::initProcess();	
+	}
 
 }