diff --git a/dev/skeletons/modMyModule.class.php b/dev/skeletons/modMyModule.class.php
index a54aac470e5..ed8f8ed976e 100644
--- a/dev/skeletons/modMyModule.class.php
+++ b/dev/skeletons/modMyModule.class.php
@@ -166,7 +166,11 @@ class modMyModule extends DolibarrModules
 		// Add here list of php file(s) stored in core/boxes that contains class to show a box.
         $this->boxes = array();			// List of boxes
 		// Example:
-		//$this->boxes=array(array(0=>array('file'=>'myboxa.php','note'=>'','enabledbydefaulton'=>'Home'),1=>array('file'=>'myboxb.php','note'=>''),2=>array('file'=>'myboxc.php','note'=>'')););
+		//$this->boxes=array(
+		//    0=>array('file'=>'myboxa.php@mymodule','note'=>'','enabledbydefaulton'=>'Home'),
+		//    1=>array('file'=>'myboxb.php@mymodule','note'=>''),
+		//    2=>array('file'=>'myboxc.php@mymodule','note'=>'')
+		//);
 
 		// Cronjobs
 		$this->cronjobs = array();			// List of cron jobs entries to add
diff --git a/htdocs/comm/propal/class/propal.class.php b/htdocs/comm/propal/class/propal.class.php
index 250687a5c02..cda28c80b37 100644
--- a/htdocs/comm/propal/class/propal.class.php
+++ b/htdocs/comm/propal/class/propal.class.php
@@ -2901,8 +2901,7 @@ class Propal extends CommonObject
 
 
 /**
- *	\class      PropaleLigne
- *	\brief      Class to manage commercial proposal lines
+ *	Class to manage commercial proposal lines
  */
 class PropaleLigne  extends CommonObjectLine
 {
diff --git a/htdocs/product/card.php b/htdocs/product/card.php
index 77b14b24c7a..50a12726822 100644
--- a/htdocs/product/card.php
+++ b/htdocs/product/card.php
@@ -184,7 +184,13 @@ if (empty($reshook))
             $action = "create";
             $error++;
         }
-
+        if (! empty(GETPOST('duration_value')) && empty(GETPOST('duration_unit')))
+        {
+            setEventMessage($langs->trans('ErrorFieldRequired',$langs->transnoentities('Unit')), 'errors');
+            $action = "create";
+            $error++;
+        }
+        
         if (! $error)
         {
 	        $units = GETPOST('units', 'int');