diff --git a/htdocs/commande/fiche.php b/htdocs/commande/fiche.php
index 1f8808bacf9..3efad393732 100644
--- a/htdocs/commande/fiche.php
+++ b/htdocs/commande/fiche.php
@@ -519,35 +519,35 @@ else if ($action == 'setnote' && $user->rights->commande->creer)
 else if ($action == 'addline' && $user->rights->commande->creer)
 {
 	$langs->load('errors');
-	$result = 0;
+	$error = false;
 
 	if ((GETPOST('np_price') < 0) && (GETPOST('qty') < 0))
     {
-        $mesgs[] = '<div class="error">'.$langs->trans('ErrorBothFieldCantBeNegative', $langs->transnoentitiesnoconv('UnitPrice'),$langs->transnoentitiesnoconv('Qty')).'</div>';
-        $result = -1 ;
+        setEventMessage($langs->trans('ErrorBothFieldCantBeNegative', $langs->transnoentitiesnoconv('UnitPrice'), $langs->transnoentitiesnoconv('Qty')), 'errors');
+        $error = true;
     }
 	if (! GETPOST('idprod') && GETPOST('type') < 0)
 	{
-		$mesgs[] = '<div class="error">'.$langs->trans('ErrorFieldRequired', $langs->transnoentitiesnoconv('Type')).'</div>';
-		$result = -1 ;
+		setEventMessage($langs->trans('ErrorFieldRequired', $langs->transnoentitiesnoconv('Type')), 'errors');
+        $error = true;
 	}
 	if (! GETPOST('idprod') && GETPOST('np_price') == '') // Unit price can be 0 but not ''
 	{
-		$mesgs[] = '<div class="error">'.$langs->trans('ErrorFieldRequired', $langs->transnoentitiesnoconv('UnitPrice')).'</div>';
-		$result = -1 ;
+		setEventMessage($langs->trans($langs->trans('ErrorFieldRequired', $langs->transnoentitiesnoconv('UnitPrice'))), 'errors');
+        $error = true;
 	}
 	if (! GETPOST('qty') && GETPOST('qty') == '')
     {
-        $mesgs[] = '<div class="error">'.$langs->trans('ErrorFieldRequired', $langs->transnoentitiesnoconv('Qty')).'</div>';
-        $result = -1 ;
+        setEventMessage($langs->trans('ErrorFieldRequired', $langs->transnoentitiesnoconv('Qty')), 'errors');
+        $error = true;
     }
     if (! GETPOST('idprod') && (GETPOST('np_desc') == '') && (GETPOST('dp_desc') == ''))
     {
-        $mesgs[] = '<div class="error">'.$langs->trans('ErrorFieldRequired', $langs->transnoentitiesnoconv('Description')).'</div>';
-        $result = -1 ;
+        setEventMessage($langs->trans('ErrorFieldRequired', $langs->transnoentitiesnoconv('Description')), 'errors');
+        $error = true;
     }
 
-	if ($result >= 0 && GETPOST('qty') && ((GETPOST('np_price') != '' && (GETPOST('np_desc') || GETPOST('dp_desc'))) || GETPOST('idprod')))
+	if (!$error && GETPOST('qty') && ((GETPOST('np_price') != '' && (GETPOST('np_desc') || GETPOST('dp_desc'))) || GETPOST('idprod')))
 	{
 		// Clean parameters
 		$suffixe = GETPOST('idprod') ? '_predef' : '';
diff --git a/htdocs/fourn/commande/fiche.php b/htdocs/fourn/commande/fiche.php
index 3e962449326..88af4e5ada6 100644
--- a/htdocs/fourn/commande/fiche.php
+++ b/htdocs/fourn/commande/fiche.php
@@ -171,35 +171,35 @@ else if ($action == 'reopen' && $user->rights->fournisseur->commande->approuver)
 else if ($action == 'addline' && $user->rights->fournisseur->commande->creer)
 {
     $langs->load('errors');
-    $result = 0;
+    $error = false;
 
     if ($_POST['pu'] < 0 && $_POST['qty'] < 0)
     {
-        $mesgs[]='<div class="error">'.$langs->trans("ErrorBothFieldCantBeNegative",$langs->transnoentitiesnoconv("UnitPriceHT"),$langs->transnoentitiesnoconv("Qty")).'</div>';
-        $result = -1 ;
+        setEventMessage($langs->trans('ErrorBothFieldCantBeNegative', $langs->transnoentitiesnoconv('UnitPrice'), $langs->transnoentitiesnoconv('Qty')), 'errors');
+        $error = true;
     }
     if (empty($_POST['idprodfournprice']) && $_POST['type'] < 0)
     {
-        $mesgs[]='<div class="error">'.$langs->trans("ErrorFieldRequired",$langs->transnoentitiesnoconv("Type")).'</div>';
-        $result = -1 ;
+        setEventMessage($langs->trans('ErrorFieldRequired', $langs->transnoentitiesnoconv('Type')), 'errors');
+        $error = true;
     }
     if (empty($_POST['idprodfournprice']) && (! isset($_POST['pu']) || $_POST['pu']=='')) // Unit price can be 0 but not ''
     {
-        $mesgs[]='<div class="error">'.$langs->trans("ErrorFieldRequired",$langs->transnoentitiesnoconv("UnitPrice")).'</div>';
-        $result = -1 ;
+        setEventMessage($langs->trans($langs->trans('ErrorFieldRequired', $langs->transnoentitiesnoconv('UnitPrice'))), 'errors');
+        $error = true;
     }
-    if (empty($_POST['idprodfournprice']) && empty($_POST["np_desc"]) && empty($_POST["dp_desc"]))
+    if (empty($_POST['idprodfournprice']) && empty($_POST['np_desc']) && empty($_POST['dp_desc']))
     {
-        $mesgs[]='<div class="error">'.$langs->trans("ErrorFieldRequired",$langs->transnoentitiesnoconv("Description")).'</div>';
-        $result = -1 ;
+        setEventMessage($langs->trans('ErrorFieldRequired', $langs->transnoentitiesnoconv('Description')), 'errors');
+        $error = true;
     }
-    if ((! isset($_POST['qty']) || $_POST['qty']==''))
+    if ((! isset($_POST['qty']) || $_POST['qty'] == ''))
     {
-        $mesgs[]='<div class="error">'.$langs->trans("ErrorFieldRequired",$langs->transnoentitiesnoconv('Qty')).'</div>';
-        $result = -1 ;
+        setEventMessage($langs->trans('ErrorFieldRequired', $langs->transnoentitiesnoconv('Qty')), 'errors');
+        $error = true;
     }
 
-    if ($result >= 0 && (($_POST['qty'] || $_POST['pqty']) && (($_POST['pu'] && ($_POST['np_desc'] || $_POST['dp_desc'])) || $_POST['idprodfournprice'])))
+    if (!$error && (($_POST['qty'] || $_POST['pqty']) && (($_POST['pu'] && ($_POST['np_desc'] || $_POST['dp_desc'])) || $_POST['idprodfournprice'])))
     {
         if ($object->fetch($id) < 0) dol_print_error($db,$object->error);
         if ($object->fetch_thirdparty() < 0) dol_print_error($db,$object->error);
@@ -1816,8 +1816,6 @@ if ($id > 0 || ! empty($ref))
     }
 }
 
-dol_htmloutput_mesg('', $mesgs);
-
 // End of page
 llxFooter();