diff --git a/htdocs/adherents/card_subscriptions.php b/htdocs/adherents/card_subscriptions.php
index fa7d59f040e..c3fdd1176a1 100644
--- a/htdocs/adherents/card_subscriptions.php
+++ b/htdocs/adherents/card_subscriptions.php
@@ -52,7 +52,6 @@ $object = new Adherent($db);
 $extrafields = new ExtraFields($db);
 $adht = new AdherentType($db);
 $errmsg='';
-$errmsgs=array();
 
 $defaultdelay=1;
 $defaultdelayunit='y';
@@ -108,7 +107,7 @@ if ($action == 'confirm_create_thirdparty' && $confirm == 'yes' && $user->rights
 		{
 			$langs->load("errors");
 			$errmsg=$langs->trans($company->error);
-			$errmsgs=$company->errors;
+			setEventMessage($company->errors, 'errors');
 		}
 		else
 		{
@@ -282,7 +281,7 @@ if ($user->rights->adherent->cotisation->creer && $action == 'cotisation' && ! $
         {
             $error++;
             $errmsg=$object->error;
-            $errmsgs=$object->errors;
+	        setEventMessage($object->errors, 'errors');
         }
 
         if (! $error)
@@ -444,7 +443,7 @@ if ($user->rights->adherent->cotisation->creer && $action == 'cotisation' && ! $
                         if (! ($bank_line_id > 0))
                         {
                             $errmsg=$paiement->error;
-                            $errmsgs=$paiement->errors;
+	                        setEventMessage($paiement->errors, 'errors');
                             $error++;
                         }
                     }
@@ -689,7 +688,7 @@ if ($rowid)
     dol_fiche_end();
 
 
-    dol_htmloutput_errors($errmsg,$errmsgs);
+    dol_htmloutput_errors($errmsg);
 
 
     /*
diff --git a/htdocs/admin/boxes.php b/htdocs/admin/boxes.php
index bc140735c61..0a23b26f36c 100644
--- a/htdocs/admin/boxes.php
+++ b/htdocs/admin/boxes.php
@@ -34,7 +34,6 @@ if (! $user->admin) accessforbidden();
 
 $rowid = GETPOST('rowid','int');
 $action = GETPOST('action','alpha');
-$errmesg='';
 
 // Define possible position of boxes
 $pos_name = getStaticMember('InfoBox','listOfPages');
@@ -80,7 +79,7 @@ if ($action == 'add')
 		}
 		else
 		{
-		    $errmesg=$db->lasterror();
+			setEventMessage($db->lasterror(), 'errors');
 		    $error++;
 		}
 	}
@@ -116,7 +115,7 @@ if ($action == 'add')
 	        $resql = $db->query($sql);
 	        if (! $resql)
 	        {
-		        $errmesg=$db->lasterror();
+		        setEventMessage($db->lasterror(), 'errors');
 	            $error++;
 	        }
 	    }
@@ -217,9 +216,6 @@ print_fiche_titre($langs->trans("Boxes"),'','setup');
 
 print $langs->trans("BoxesDesc")." ".$langs->trans("OnlyActiveElementsAreShown")."<br>\n";
 
-dol_htmloutput_errors($errmesg);
-
-
 /*
  * Recherche des boites actives par defaut pour chaque position possible
  * On stocke les boites actives par defaut dans $boxes[position][id_boite]=1
diff --git a/htdocs/admin/fckeditor.php b/htdocs/admin/fckeditor.php
index 8c5dd6585f7..650def1f1af 100644
--- a/htdocs/admin/fckeditor.php
+++ b/htdocs/admin/fckeditor.php
@@ -120,7 +120,10 @@ $var=true;
 
 if (empty($conf->use_javascript_ajax))
 {
-    dol_htmloutput_errors('',array($langs->trans("NotAvailable"),$langs->trans("JavascriptDisabled")),1);
+	setEventMessage(array(
+		$langs->trans("NotAvailable"),
+		$langs->trans("JavascriptDisabled")
+	), 'errors');
 }
 else
 {
diff --git a/htdocs/admin/fiscalyear.php b/htdocs/admin/fiscalyear.php
index 1cc06281a66..dfb404b0b6b 100644
--- a/htdocs/admin/fiscalyear.php
+++ b/htdocs/admin/fiscalyear.php
@@ -43,7 +43,6 @@ static $tmpstatut2label=array(
 $statut2label=array('');
 foreach ($tmpstatut2label as $key => $val) $statut2label[$key]=$langs->trans($val);
 
-$mesg='';
 $errors=array();
 
 $object = new Fiscalyear($db);
@@ -64,8 +63,6 @@ $title = $langs->trans('FiscalYears');
 
 print_fiche_titre($langs->trans('FiscalYears'));
 
-dol_htmloutput_errors($mesg);
-
 $sql = "SELECT f.rowid, f.label, f.date_start, f.date_end, f.statut, f.entity";
 $sql.= " FROM ".MAIN_DB_PREFIX."accounting_fiscalyear as f";
 $sql.= " WHERE f.entity = ".$conf->entity;
diff --git a/htdocs/admin/menus.php b/htdocs/admin/menus.php
index b09b524b435..2e050a4bbe8 100644
--- a/htdocs/admin/menus.php
+++ b/htdocs/admin/menus.php
@@ -49,8 +49,6 @@ foreach($dirmenus as $dirmenu)
 }
 
 $error=0;
-$errmsgs=array();
-
 
 // Cette page peut etre longue. On augmente le delai autorise.
 // Ne fonctionne que si on est pas en safe_mode.
@@ -105,7 +103,8 @@ if ($action == 'update' && empty($_POST["cancel"]))
 				else
 				{
 					$error++;
-					$errmsgs[]='Failed to initialize menu '.$key.'.';
+					//TODO: Translate
+					setEventMessage('Failed to initialize menu '.$key.'.', 'errors');
 					$db->rollback();
 				}
 			}
@@ -268,10 +267,6 @@ else
 
 print '</div>';
 
-
-dol_htmloutput_errors('',$errmsgs);
-
-
 if ($action != 'edit')
 {
 	print '<div class="tabsAction">';
diff --git a/htdocs/barcode/codeinit.php b/htdocs/barcode/codeinit.php
index a5d207b5339..1484566dbaf 100644
--- a/htdocs/barcode/codeinit.php
+++ b/htdocs/barcode/codeinit.php
@@ -37,8 +37,6 @@ $forbarcode=GETPOST('forbarcode');
 $fk_barcode_type=GETPOST('fk_barcode_type');
 $eraseallbarcode=GETPOST('eraseallbarcode');
 
-$mesg='';
-
 $action=GETPOST('action');
 
 $producttmp=new Product($db);
@@ -198,8 +196,6 @@ print '<br>';
 print $langs->trans("MassBarcodeInitDesc").'<br>';
 print '<br>';
 
-dol_htmloutput_errors($mesg);
-
 //print img_picto('','puce').' '.$langs->trans("PrintsheetForOneBarCode").'<br>';
 //print '<br>';
 
diff --git a/htdocs/categories/edit.php b/htdocs/categories/edit.php
index 0c61ab8cca6..aa82fdb455d 100644
--- a/htdocs/categories/edit.php
+++ b/htdocs/categories/edit.php
@@ -80,12 +80,12 @@ if ($action == 'update' && $user->rights->categorie->creer)
 	if (empty($categorie->label))
 	{
 		$action = 'create';
-		$mesg = $langs->trans("ErrorFieldRequired",$langs->transnoentities("Label"));
+		setEventMessage($langs->trans("ErrorFieldRequired",$langs->transnoentities("Label")), 'errors');
 	}
 	if (empty($categorie->description))
 	{
 		$action = 'create';
-		$mesg = $langs->trans("ErrorFieldRequired",$langs->transnoentities("Description"));
+		setEventMessage($langs->trans("ErrorFieldRequired",$langs->transnoentities("Description")), 'errors');
 	}
 	if (empty($categorie->error))
 	{
@@ -98,12 +98,12 @@ if ($action == 'update' && $user->rights->categorie->creer)
 		}
 		else
 		{
-			$mesg=$categorie->error;
+			setEventMessage($categorie->error, 'errors');
 		}
 	}
 	else
 	{
-		$mesg=$categorie->error;
+		setEventMessage($categorie->error, 'errors');
 	}
 }
 
@@ -117,10 +117,6 @@ llxHeader("","",$langs->trans("Categories"));
 
 print_fiche_titre($langs->trans("ModifCat"));
 
-
-dol_htmloutput_errors($mesg);
-
-
 $object->fetch($id);
 
 $form = new Form($db);
diff --git a/htdocs/categories/fiche.php b/htdocs/categories/fiche.php
index aca14acce2b..66370022c20 100644
--- a/htdocs/categories/fiche.php
+++ b/htdocs/categories/fiche.php
@@ -131,7 +131,7 @@ if ($action == 'add' && $user->rights->categorie->creer)
 	if (! $object->label)
 	{
 		$error++;
-		$errors[] = $langs->trans("ErrorFieldRequired",$langs->transnoentities("Ref"));
+		setEventMessage($langs->trans("ErrorFieldRequired",$langs->transnoentities("Ref")), 'errors');
 		$action = 'create';
 	}
 
@@ -224,8 +224,6 @@ if ($user->rights->categorie->creer)
 
 		print_fiche_titre($langs->trans("CreateCat"));
 
-		dol_htmloutput_errors('',$errors);
-
 		print '<table width="100%" class="border">';
 
 		// Ref
diff --git a/htdocs/comm/address.php b/htdocs/comm/address.php
index 8e892845c66..86333a3996c 100644
--- a/htdocs/comm/address.php
+++ b/htdocs/comm/address.php
@@ -106,7 +106,7 @@ if ($action == 'add' || $action == 'update')
         }
         else
         {
-            $mesg = $object->error;
+	        setEventMessage($object->error, 'errors');
             $action='create';
         }
     }
@@ -147,7 +147,7 @@ if ($action == 'add' || $action == 'update')
         else
         {
             $reload = 0;
-            $mesg = $object->error;
+	        setEventMessage($object->error, 'errors');
             $actino= "edit";
         }
     }
@@ -181,9 +181,6 @@ $form = new Form($db);
 $formcompany = new FormCompany($db);
 $countrynotdefined=$langs->trans("ErrorSetACountryFirst").' ('.$langs->trans("SeeAbove").')';
 
-dol_htmloutput_errors($mesg);
-
-
 if ($action == 'create')
 {
     if ($user->rights->societe->creer)
diff --git a/htdocs/comm/propal.php b/htdocs/comm/propal.php
index c2183a2b6e1..64a3475572e 100644
--- a/htdocs/comm/propal.php
+++ b/htdocs/comm/propal.php
@@ -1645,7 +1645,7 @@ if ($action == 'create') {
 			$numref = $object->getNextNumRef($soc);
 			if (empty($numref)) {
 				$error ++;
-				dol_htmloutput_errors($object->error);
+				setEventMessage($object->error, 'errors');
 			}
 		} else {
 			$numref = $object->ref;
diff --git a/htdocs/comm/remise.php b/htdocs/comm/remise.php
index 5fc0c7ec9bb..544ef619720 100644
--- a/htdocs/comm/remise.php
+++ b/htdocs/comm/remise.php
@@ -71,7 +71,7 @@ if (GETPOST("action") == 'setremise')
 	}
 	else
 	{
-		$errmesg=$soc->error;
+		setEventMessage($soc->error, 'errors');
 	}
 }
 
@@ -97,8 +97,6 @@ if ($socid > 0)
 	$objsoc->id=$socid;
 	$objsoc->fetch($socid);
 
-	dol_htmloutput_errors($errmesg);
-
 	$head = societe_prepare_head($objsoc);
 
 	dol_fiche_head($head, 'relativediscount', $langs->trans("ThirdParty"),0,'company');
diff --git a/htdocs/compta/bank/account.php b/htdocs/compta/bank/account.php
index 8a8f00d2357..69962498312 100644
--- a/htdocs/compta/bank/account.php
+++ b/htdocs/compta/bank/account.php
@@ -72,8 +72,6 @@ if ($negpage)
     if ($page > GETPOST("nbpage")) $page = GETPOST("nbpage");
 }
 
-$mesg='';
-
 $object = new Account($db);
 
 /*
@@ -83,6 +81,8 @@ $dateop=-1;
 
 if ($action == 'add' && $id && ! isset($_POST["cancel"]) && $user->rights->banque->modifier)
 {
+	$error = 0;
+
 	if (price2num($_POST["credit"]) > 0)
 	{
 		$amount = price2num($_POST["credit"]);
@@ -98,11 +98,20 @@ if ($action == 'add' && $id && ! isset($_POST["cancel"]) && $user->rights->banqu
 	$label=$_POST["label"];
 	$cat1=$_POST["cat1"];
 
-	if (! $dateop)    $mesg=$langs->trans("ErrorFieldRequired",$langs->trans("Date"));
-	if (! $operation) $mesg=$langs->trans("ErrorFieldRequired",$langs->trans("Type"));
-	if (! $amount)    $mesg=$langs->trans("ErrorFieldRequired",$langs->trans("Amount"));
+	if (! $dateop) {
+		$error++;
+		setEventMessage($langs->trans("ErrorFieldRequired",$langs->trans("Date")), 'errors');
+	}
+	if (! $operation) {
+		$error++;
+		setEventMessage($langs->trans("ErrorFieldRequired",$langs->trans("Type")), 'errors');
+	}
+	if (! $amount) {
+		$error++;
+		setEventMessage($langs->trans("ErrorFieldRequired",$langs->trans("Amount")), 'errors');
+	}
 
-	if (! $mesg)
+	if (! $error)
 	{
 		$object->fetch($id);
 		$insertid = $object->addline($dateop, $operation, $label, $amount, $num_chq, $cat1, $user);
@@ -114,7 +123,7 @@ if ($action == 'add' && $id && ! isset($_POST["cancel"]) && $user->rights->banqu
 		}
 		else
 		{
-			$mesg=$object->error;
+			setEventMessage($object->error, 'errors');
 		}
 	}
 	else
@@ -295,8 +304,6 @@ if ($id > 0 || ! empty($ref))
 
 	print '<br>';
 
-	dol_htmloutput_errors($mesg);
-
 	/**
 	 * Search form
 	 */
diff --git a/htdocs/compta/deplacement/fiche.php b/htdocs/compta/deplacement/fiche.php
index e0183094d23..9df4bb90652 100644
--- a/htdocs/compta/deplacement/fiche.php
+++ b/htdocs/compta/deplacement/fiche.php
@@ -44,8 +44,6 @@ $result = restrictedArea($user, 'deplacement', $id,'');
 $action = GETPOST('action','alpha');
 $confirm = GETPOST('confirm','alpha');
 
-$mesg = '';
-
 $object = new Deplacement($db);
 
 // Initialize technical object to manage hooks of thirdparties. Note that conf->hooks_modules contains array array
@@ -73,7 +71,7 @@ if ($action == 'validate' && $user->rights->deplacement->creer)
         }
         else
         {
-            $mesg=$object->error;
+	        setEventMessage($object->error, 'errors');
         }
     }
 }
@@ -88,7 +86,7 @@ else if ($action == 'confirm_delete' && $confirm == "yes" && $user->rights->depl
     }
     else
     {
-        $mesg=$object->error;
+	    setEventMessage($object->error, 'errors');
     }
 }
 
@@ -109,17 +107,17 @@ else if ($action == 'add' && $user->rights->deplacement->creer)
 
         if (! $object->date)
         {
-            $mesg=$langs->trans("ErrorFieldRequired",$langs->transnoentitiesnoconv("Date"));
+	        setEventMessage($langs->trans("ErrorFieldRequired",$langs->transnoentitiesnoconv("Date")), 'errors');
             $error++;
         }
         if ($object->type == '-1') 	// Otherwise it is TF_LUNCH,...
         {
-            $mesg='<div class="error">'.$langs->trans("ErrorFieldRequired",$langs->transnoentitiesnoconv("Type")).'</div>';
+	        setEventMessage($langs->trans("ErrorFieldRequired",$langs->transnoentitiesnoconv("Type")), 'errors');
             $error++;
         }
         if (! ($object->fk_user > 0))
         {
-            $mesg='<div class="error">'.$langs->trans("ErrorFieldRequired",$langs->transnoentitiesnoconv("Person")).'</div>';
+	        setEventMessage($langs->trans("ErrorFieldRequired",$langs->transnoentitiesnoconv("Person")), 'errors');
             $error++;
         }
 
@@ -134,7 +132,7 @@ else if ($action == 'add' && $user->rights->deplacement->creer)
             }
             else
             {
-                $mesg=$object->error;
+	            setEventMessage($object->error, 'errors');
                 $action='create';
             }
         }
@@ -174,7 +172,7 @@ else if ($action == 'update' && $user->rights->deplacement->creer)
         }
         else
         {
-            $mesg=$object->error;
+	        setEventMessage($object->error, 'errors');
         }
     }
     else
@@ -226,8 +224,6 @@ if ($action == 'create')
 
     print_fiche_titre($langs->trans("NewTrip"));
 
-    dol_htmloutput_errors($mesg);
-
     $datec = dol_mktime(12, 0, 0, GETPOST('remonth','int'), GETPOST('reday','int'), GETPOST('reyear','int'));
 
     print '<form name="add" action="' . $_SERVER["PHP_SELF"] . '" method="POST">' . "\n";
@@ -299,8 +295,6 @@ else if ($id)
     $result = $object->fetch($id);
     if ($result > 0)
     {
-        dol_htmloutput_mesg($mesg);
-
         $head = trip_prepare_head($object);
 
         dol_fiche_head($head, 'card', $langs->trans("TripCard"), 0, 'trip');
diff --git a/htdocs/compta/dons/fiche.php b/htdocs/compta/dons/fiche.php
index 9f9f8793ad5..1b09863d4dd 100644
--- a/htdocs/compta/dons/fiche.php
+++ b/htdocs/compta/dons/fiche.php
@@ -43,9 +43,6 @@ $action=GETPOST('action','alpha');
 $cancel=GETPOST('cancel');
 $amount=GETPOST('amount');
 
-$mesg="";
-$mesgs=array();
-
 $don = new Don($db);
 $donation_date=dol_mktime(12, 0, 0, GETPOST('remonth'), GETPOST('reday'), GETPOST('reyear'));
 
@@ -72,14 +69,14 @@ if ($action == 'update')
 
     if (empty($donation_date))
     {
-        $mesgs[]=$langs->trans("ErrorFieldRequired",$langs->trans("Date"));
+	    setEventMessage($langs->trans("ErrorFieldRequired",$langs->trans("Date")), 'errors');
         $action = "create";
         $error++;
     }
 
 	if (empty($amount))
 	{
-		$mesgs[]=$langs->trans("ErrorFieldRequired",$langs->trans("Amount"));
+		$setEventMessage($langs->trans("ErrorFieldRequired",$langs->trans("Amount")), 'errors');
 		$action = "create";
 		$error++;
 	}
@@ -125,14 +122,14 @@ if ($action == 'add')
 
     if (empty($donation_date))
     {
-        $mesgs[]=$langs->trans("ErrorFieldRequired",$langs->trans("Date"));
+	    setEventMessage($langs->trans("ErrorFieldRequired",$langs->trans("Date")), 'errors');
         $action = "create";
         $error++;
     }
 
 	if (empty($amount))
 	{
-		$mesgs[]=$langs->trans("ErrorFieldRequired",$langs->trans("Amount"));
+		setEventMessage($langs->trans("ErrorFieldRequired",$langs->trans("Amount")), 'errors');
 		$action = "create";
 		$error++;
 	}
@@ -182,7 +179,9 @@ if ($action == 'valid_promesse')
 		header("Location: ".$_SERVER['PHP_SELF']."?id=".$id);
 		exit;
 	}
-    else $mesg=$don->error;
+    else {
+	    setEventMessage($don->error, 'errors');
+    }
 }
 if ($action == 'set_cancel')
 {
@@ -191,7 +190,9 @@ if ($action == 'set_cancel')
         header("Location: ".$_SERVER['PHP_SELF']."?id=".$id);
         exit;
     }
-    else $mesg=$don->error;
+    else {
+	    setEventMessage($don->error, 'errors');
+    }
 }
 if ($action == 'set_paid')
 {
@@ -200,7 +201,9 @@ if ($action == 'set_paid')
 		header("Location: ".$_SERVER['PHP_SELF']."?id=".$id);
 		exit;
 	}
-    else $mesg=$don->error;
+    else {
+	    setEventMessage($don->error, 'errors');
+    }
 }
 if ($action == 'set_encaisse')
 {
@@ -209,7 +212,9 @@ if ($action == 'set_encaisse')
         header("Location: ".$_SERVER['PHP_SELF']."?id=".$id);
 		exit;
 	}
-    else $mesg=$don->error;
+    else {
+	    setEventMessage($don->error, 'errors');
+    }
 }
 
 /*
@@ -263,8 +268,6 @@ if ($action == 'create')
 {
 	print_fiche_titre($langs->trans("AddDonation"));
 
-	dol_htmloutput_errors($mesg,$mesgs);
-
 	print '<form name="add" action="fiche.php" method="post">';
 	print '<input type="hidden" name="token" value="'.$_SESSION['newtoken'].'">';
 	print '<table class="border" width="100%">';
diff --git a/htdocs/compta/paiement/cheque/fiche.php b/htdocs/compta/paiement/cheque/fiche.php
index a2bf8a7bede..920a1328a62 100644
--- a/htdocs/compta/paiement/cheque/fiche.php
+++ b/htdocs/compta/paiement/cheque/fiche.php
@@ -47,8 +47,6 @@ $fieldname = (! empty($ref)?'number':'rowid');
 if ($user->societe_id) $socid=$user->societe_id;
 $result = restrictedArea($user, 'cheque', $id, 'bordereau_cheque','','',$fieldname);
 
-$mesg='';
-
 $sortfield=GETPOST('sortfield', 'alpha');
 $sortorder=GETPOST('sortorder', 'alpha');
 $page=GETPOST('page', 'int');
@@ -122,12 +120,12 @@ if ($action == 'setref' && $user->rights->banque->cheque)
 		$result=$object->set_number($user,$number);
 		if ($result < 0)
 		{
-		    $mesg='<div class="error">'.$object->error.'</div>';
+			setEventMessage($object->error, 'errors');
 		}
 	}
 	else
 	{
-	    $mesg='<div class="error">'.$object->error.'</div>';
+		setEventMessage($object->error, 'errors');
 	}
 }
 
@@ -337,9 +335,6 @@ else
 	}
 }
 
-
-dol_htmloutput_errors($mesg);
-
 $accounts = array();
 
 if ($action == 'new')
diff --git a/htdocs/fichinter/fiche.php b/htdocs/fichinter/fiche.php
index 1c69741b6a8..637591d0606 100644
--- a/htdocs/fichinter/fiche.php
+++ b/htdocs/fichinter/fiche.php
@@ -1117,7 +1117,7 @@ else if ($id > 0 || ! empty($ref))
 			if (empty($numref))
 			{
 				$error++;
-				dol_htmloutput_errors($object->error);
+				setEventMessage($object->error, 'errors');
 			}
 		}
 		else
diff --git a/htdocs/fourn/facture/fiche.php b/htdocs/fourn/facture/fiche.php
index 4e1c3246eff..ebd02a4df91 100644
--- a/htdocs/fourn/facture/fiche.php
+++ b/htdocs/fourn/facture/fiche.php
@@ -52,8 +52,6 @@ $langs->load('companies');
 $langs->load('products');
 $langs->load('banks');
 
-$mesg='';
-$errors=array();
 $id			= (GETPOST('facid','int') ? GETPOST('facid','int') : GETPOST('id','int'));
 $action		= GETPOST("action");
 $confirm	= GETPOST("confirm");
@@ -92,12 +90,12 @@ include DOL_DOCUMENT_ROOT.'/core/actions_setnotes.inc.php';	// Must be include,
 // Action clone object
 if ($action == 'confirm_clone' && $confirm == 'yes')
 {
-    if (1==0 && empty($_REQUEST["clone_content"]) && empty($_REQUEST["clone_receivers"]))
-    {
-        $mesg='<div class="error">'.$langs->trans("NoCloneOptionsSpecified").'</div>';
-    }
-    else
-    {
+//    if (1==0 && empty($_REQUEST["clone_content"]) && empty($_REQUEST["clone_receivers"]))
+//    {
+//        $mesg='<div class="error">'.$langs->trans("NoCloneOptionsSpecified").'</div>';
+//    }
+//    else
+//    {
         $result=$object->createFromClone($id);
         if ($result > 0)
         {
@@ -107,10 +105,10 @@ if ($action == 'confirm_clone' && $confirm == 'yes')
         else
         {
             $langs->load("errors");
-            $mesg='<div class="error">'.$langs->trans($object->error).'</div>';
+	        setEventMessage($langs->trans($object->error), 'errors');
             $action='';
         }
-    }
+//    }
 }
 
 elseif ($action == 'confirm_valid' && $confirm == 'yes' && $user->rights->fournisseur->facture->valider)
@@ -137,7 +135,7 @@ elseif ($action == 'confirm_valid' && $confirm == 'yes' && $user->rights->fourni
         if (! $idwarehouse || $idwarehouse == -1)
         {
             $error++;
-            $errors[]=$langs->trans('ErrorFieldRequired',$langs->transnoentitiesnoconv("Warehouse"));
+	        setEventMessage($langs->trans('ErrorFieldRequired',$langs->transnoentitiesnoconv("Warehouse")), 'errors');
             $action='';
         }
     }
@@ -165,7 +163,7 @@ elseif ($action == 'confirm_delete' && $confirm == 'yes' && $user->rights->fourn
     }
     else
     {
-        $mesg='<div class="error">'.$object->error.'</div>';
+	    setEventMessage($object->error, 'errors');
     }
 }
 
@@ -180,7 +178,7 @@ elseif ($action == 'confirm_delete_line' && $confirm == 'yes' && $user->rights->
 	}
 	else
 	{
-		$mesg='<div class="error">'.$object->error.'</div>';
+		setEventMessage($object->error, 'errors');
 		/* Fix bug 1485 : Reset action to avoid asking again confirmation on failure */
 		$action='';
 	}
@@ -258,7 +256,9 @@ elseif ($action == 'deletepaiement' && $user->rights->fournisseur->facture->cree
     	$paiementfourn = new PaiementFourn($db);
         $result=$paiementfourn->fetch(GETPOST('paiement_id'));
         if ($result > 0) $result=$paiementfourn->delete(); // If fetch ok and found
-        if ($result < 0) $mesg='<div class="error">'.$paiementfourn->error.'</div>';
+        if ($result < 0) {
+	        setEventMessage($paiementfourn->error, 'errors');
+        }
     }
 }
 
@@ -272,21 +272,21 @@ elseif ($action == 'add' && $user->rights->fournisseur->facture->creer)
 
     if (GETPOST('socid','int')<1)
     {
-    	$mesg='<div class="error">'.$langs->trans('ErrorFieldRequired',$langs->transnoentities('Supplier')).'</div>';
+	    setEventMessage($langs->trans('ErrorFieldRequired',$langs->transnoentities('Supplier')), 'errors');
     	$action='create';
     	$error++;
     }
 
     if ($datefacture == '')
     {
-        $mesg='<div class="error">'.$langs->trans('ErrorFieldRequired',$langs->transnoentities('DateInvoice')).'</div>';
+	    setEventMessage($langs->trans('ErrorFieldRequired',$langs->transnoentities('DateInvoice')), 'errors');
         $action='create';
         $_GET['socid']=$_POST['socid'];
         $error++;
     }
     if (! GETPOST('ref_supplier'))
     {
-        $mesg='<div class="error">'.$langs->trans('ErrorFieldRequired',$langs->transnoentities('RefSupplier')).'</div>';
+	    setEventMessage($langs->trans('ErrorFieldRequired',$langs->transnoentities('RefSupplier')), 'errors');
         $action='create';
         $_GET['socid']=$_POST['socid'];
         $error++;
@@ -457,7 +457,7 @@ elseif ($action == 'add' && $user->rights->fournisseur->facture->creer)
         {
             $langs->load("errors");
             $db->rollback();
-            $mesg='<div class="error">'.$langs->trans($object->error).'</div>';
+	        setEventMessage($langs->trans($object->error), 'errors');
             $action='create';
             $_GET['socid']=$_POST['socid'];
         }
@@ -631,14 +631,14 @@ elseif ($action == 'addline' && $user->rights->fournisseur->facture->creer)
             // Product not selected
             $error++;
             $langs->load("errors");
-            $mesg='<div class="error">'.$langs->trans("ErrorFieldRequired",$langs->transnoentitiesnoconv("ProductOrService")).'</div>';
+	        setEventMessage($langs->trans("ErrorFieldRequired",$langs->transnoentitiesnoconv("ProductOrService")), 'errors');
         }
         if ($idprod == -1)
         {
             // Quantity too low
             $error++;
             $langs->load("errors");
-            $mesg='<div class="error">'.$langs->trans("ErrorQtyTooLowForThisSupplier").'</div>';
+	        setEventMessage($langs->trans("ErrorQtyTooLowForThisSupplier"), 'errors');
         }
     }
     else if( GETPOST('price_ht')!=='' || GETPOST('price_ttc')!=='' )
@@ -732,10 +732,7 @@ elseif ($action == 'addline' && $user->rights->fournisseur->facture->creer)
     else
 	{
     	$db->rollback();
-		if (empty($mesg))
-	    {
-	        $mesg='<div class="error">'.$object->error.'</div>';
-	    }
+	    setEventMessage($object->error, 'errors');
     }
 
     $action = '';
@@ -798,7 +795,7 @@ elseif ($action == 'reopen' && $user->rights->fournisseur->facture->creer)
         }
         else
         {
-            $mesg='<div class="error">'.$object->error.'</div>';
+	        setEventMessage($object->error, 'errors');
         }
     }
 }
@@ -948,7 +945,6 @@ if ($action == 'send' && ! $_POST['addfile'] && ! $_POST['removedfile'] && ! $_P
                     else
                     {
                         $langs->load("other");
-                        $mesg='<div class="error">';
                         if ($mailfile->error)
                         {
                             $mesg.=$langs->trans('ErrorFailedToSendMail',$from,$sendto);
@@ -958,7 +954,7 @@ if ($action == 'send' && ! $_POST['addfile'] && ! $_POST['removedfile'] && ! $_P
                         {
                             $mesg.='No mail sent. Feature is disabled by option MAIN_DISABLE_ALL_MAILS';
                         }
-                        $mesg.='</div>';
+	                    setEventMessage($mesg, 'errors');
                     }
                 }
             }
@@ -966,7 +962,7 @@ if ($action == 'send' && ! $_POST['addfile'] && ! $_POST['removedfile'] && ! $_P
             else
             {
                 $langs->load("other");
-                $mesg='<div class="error">'.$langs->trans('ErrorMailRecipientIsEmpty').'</div>';
+	            setEventMessage($langs->trans('ErrorMailRecipientIsEmpty'), 'errors');
                 dol_syslog('Recipient email is empty');
             }
 /*        }
@@ -980,7 +976,7 @@ if ($action == 'send' && ! $_POST['addfile'] && ! $_POST['removedfile'] && ! $_P
     else
     {
         $langs->load("other");
-        $mesg='<div class="error">'.$langs->trans('ErrorFailedToReadEntity',$langs->trans("Invoice")).'</div>';
+	    setEventMessage($langs->trans('ErrorFailedToReadEntity',$langs->trans("Invoice")), 'errors');
         dol_syslog('Unable to read data from the invoice. The invoice file has perhaps not been generated.');
     }
 
@@ -1064,11 +1060,11 @@ if (! empty($conf->global->MAIN_DISABLE_CONTACTS_TAB) && $user->rights->fourniss
 			if ($object->error == 'DB_ERROR_RECORD_ALREADY_EXISTS')
 			{
 				$langs->load("errors");
-				$mesg = '<div class="error">'.$langs->trans("ErrorThisContactIsAlreadyDefinedAsThisType").'</div>';
+				setEventMessage($langs->trans("ErrorThisContactIsAlreadyDefinedAsThisType"), 'errors');
 			}
 			else
 			{
-				$mesg = '<div class="error">'.$object->error.'</div>';
+				setEventMessage($object->error, 'errors');
 			}
 		}
 	}
@@ -1119,7 +1115,6 @@ if ($action == 'create')
 {
     print_fiche_titre($langs->trans('NewBill'));
 
-    dol_htmloutput_mesg($mesg);
     dol_htmloutput_events();
 
     $societe='';
@@ -1146,7 +1141,6 @@ if ($action == 'create')
                 $element = $subelement = 'commande';
             }
             if ($element == 'propal')   {
-                dol_htmloutput_errors('',$errors);
                 $element = 'comm/propal'; $subelement = 'propal';
             }
             if ($element == 'contract') {
@@ -1479,9 +1473,6 @@ else
 
         dol_fiche_head($head, 'card', $titre, 0, 'bill');
 
-        dol_htmloutput_mesg($mesg);
-        dol_htmloutput_errors('',$errors);
-
         // Confirmation de la suppression d'une ligne produit
         if ($action == 'confirm_delete_line')
         {
diff --git a/htdocs/fourn/facture/paiement.php b/htdocs/fourn/facture/paiement.php
index f02e48a9be5..5e7658d25b0 100644
--- a/htdocs/fourn/facture/paiement.php
+++ b/htdocs/fourn/facture/paiement.php
@@ -503,9 +503,6 @@ if (empty($action))
 
         print_barre_liste($langs->trans('SupplierPayments'), $page, 'paiement.php',$paramlist,$sortfield,$sortorder,'',$num);
 
-        if ($mesg) dol_htmloutput_mesg($mesg);
-        if ($errmsg) dol_htmloutput_errors($errmsg);
-
         print '<form method="GET" action="'.$_SERVER["PHP_SELF"].'">';
         print '<table class="noborder" width="100%">';
         print '<tr class="liste_titre">';
diff --git a/htdocs/product/admin/product_extrafields.php b/htdocs/product/admin/product_extrafields.php
index fd31abaa80e..58b4624f5bc 100644
--- a/htdocs/product/admin/product_extrafields.php
+++ b/htdocs/product/admin/product_extrafields.php
@@ -89,8 +89,6 @@ dol_fiche_head($head, 'attributes', $tab, 0, 'product');
 print $langs->trans('DefineHereComplementaryAttributes', $tab).'<br>'."\n";
 print '<br>';
 
-dol_htmloutput_errors($mesg);
-
 // Load attribute_label
 $extrafields->fetch_name_optionals_label($elementtype);
 
diff --git a/htdocs/product/composition/fiche.php b/htdocs/product/composition/fiche.php
index 26761a2d56b..47f7bf9c42a 100644
--- a/htdocs/product/composition/fiche.php
+++ b/htdocs/product/composition/fiche.php
@@ -49,8 +49,6 @@ $fieldvalue = (! empty($id) ? $id : (! empty($ref) ? $ref : ''));
 $fieldtype = (! empty($ref) ? 'ref' : 'rowid');
 $result=restrictedArea($user,'produit|service',$fieldvalue,'product&product','','',$fieldtype);
 
-$mesg = '';
-
 $product = new Product($db);
 $productid=0;
 if ($id > 0 || ! empty($ref))
@@ -83,8 +81,11 @@ $cancel <> $langs->trans("Cancel") &&
 			{
 				$error++;
 				$action = 're-edit';
-				if ($product->error == "isFatherOfThis") $mesg = $langs->trans("ErrorAssociationIsFatherOfThis");
-				else $mesg=$product->error;
+				if ($product->error == "isFatherOfThis") {
+					setEventMessage($langs->trans("ErrorAssociationIsFatherOfThis"), 'errors');
+				} else {
+					setEventMessage($product->error, 'errors');
+				}
 			}
 		}
 		else
@@ -97,7 +98,7 @@ $cancel <> $langs->trans("Cancel") &&
 			{
 				$error++;
 				$action = 're-edit';
-				$mesg=$product->error;
+				setEventMessage($product->error, 'errors');
 			}
 		}
 	}
@@ -161,10 +162,6 @@ if ($action == 'search')
 
 llxHeader("","",$langs->trans("CardProduct".$product->type));
 
-
-dol_htmloutput_errors($mesg);
-
-
 $head=product_prepare_head($product, $user);
 $titre=$langs->trans("CardProduct".$product->type);
 $picto=($product->type==1?'service':'product');
diff --git a/htdocs/projet/tasks.php b/htdocs/projet/tasks.php
index 7c94401f861..de9ef77746d 100644
--- a/htdocs/projet/tasks.php
+++ b/htdocs/projet/tasks.php
@@ -90,13 +90,13 @@ if ($action == 'createtask' && $user->rights->projet->creer)
 	{
 		if (empty($label))
 		{
-			$mesg=$langs->trans("ErrorFieldRequired",$langs->transnoentities("Label"));
+			setEventMessage($langs->trans("ErrorFieldRequired",$langs->transnoentities("Label")), 'errors');
 			$action='create';
 			$error++;
 		}
 		else if (empty($_POST['task_parent']))
 		{
-			$mesg=$langs->trans("ErrorFieldRequired",$langs->transnoentities("ChildOfTask"));
+			setEventMessage($langs->trans("ErrorFieldRequired",$langs->transnoentities("ChildOfTask")), 'errors');
 			$action='create';
 			$error++;
 		}
@@ -267,8 +267,6 @@ if ($action == 'create' && $user->rights->projet->creer && (empty($object->socie
 
 	print_fiche_titre($langs->trans("NewTask"));
 
-	dol_htmloutput_errors($mesg);
-
 	print '<form action="'.$_SERVER['PHP_SELF'].'" method="POST">';
 	print '<input type="hidden" name="token" value="'.$_SESSION['newtoken'].'">';
 	print '<input type="hidden" name="action" value="createtask">';
diff --git a/htdocs/societe/consumption.php b/htdocs/societe/consumption.php
index 07479c59d34..93fd8672c16 100644
--- a/htdocs/societe/consumption.php
+++ b/htdocs/societe/consumption.php
@@ -442,14 +442,6 @@ else {
 print "</table>";
 print "</form>";
 
-
-/*
- * Errors
- */
-
-dol_htmloutput_errors($warning);
-dol_htmloutput_errors($error,$errors);
-
 llxFooter();
 
 $db->close();