diff --git a/ChangeLog b/ChangeLog
index a5dcdbed28bc9341ff353e58603661341578b91a..778855c4fe0ba09e6be0f80dfd41f8383ce905f9 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -65,6 +65,9 @@ For users:
 - Fix: Add actions events not implemented.
 - Fix: Price min of composition is not supplier price min by quantity.
 - Fix: [ bug #1356 ] Bank accountancy number is limited to 8 numbers.
+- Fix: [ bug #1478 ] BILL_PAYED trigger action does not intercept failure under some circumstances
+- Fix: [ bug #1479 ] Several customer invoice triggers do not intercept trigger action
+- Fix: [ bug #1477 ] Several customer invoice triggers do not show trigger error messages
 
 TODO
 - New: Predefined product and free product use same form.
diff --git a/htdocs/compta/facture.php b/htdocs/compta/facture.php
index e03f381ba2291936a2e95a42c82f7a6b6d8b40be..5c359b718642ba91ddf878d23ec09b0b6c717919 100644
--- a/htdocs/compta/facture.php
+++ b/htdocs/compta/facture.php
@@ -124,7 +124,7 @@ if ($action == 'confirm_clone' && $confirm == 'yes' && $user->rights->facture->c
 				header("Location: " . $_SERVER['PHP_SELF'] . '?facid=' . $result);
 				exit();
 			} else {
-				$mesgs [] = $object->error;
+				setEventMessage($object->error, 'errors');
 				$action = '';
 			}
 		}
@@ -140,7 +140,7 @@ else if ($action == 'reopen' && $user->rights->facture->creer) {
 			header('Location: ' . $_SERVER["PHP_SELF"] . '?facid=' . $id);
 			exit();
 		} else {
-			$mesgs [] = '<div class="error">' . $object->error . '</div>';
+			setEventMessage($object->error, 'errors');
 		}
 	}
 }
@@ -164,7 +164,8 @@ else if ($action == 'confirm_delete' && $confirm == 'yes' && $user->rights->fact
 		header('Location: ' . DOL_URL_ROOT . '/compta/facture/list.php');
 		exit();
 	} else {
-		$mesgs [] = '<div class="error">' . $object->error . '</div>';
+		setEventMessage($object->error, 'errors');
+		$action='';
 	}
 }
 
@@ -195,7 +196,7 @@ else if ($action == 'confirm_deleteline' && $confirm == 'yes' && $user->rights->
 			exit();
 		}
 	} else {
-		$mesgs [] = '<div clas="error">' . $object->error . '</div>';
+		setEventMessage($object->error, 'errors');
 		$action = '';
 	}
 }
@@ -453,7 +454,8 @@ else if ($action == 'confirm_modif' && ((empty($conf->global->MAIN_USE_ADVANCED_
 
 		// On verifie si aucun paiement n'a ete effectue
 		if ($resteapayer == $object->total_ttc && $object->paye == 0 && $ventilExportCompta == 0) {
-			$object->set_draft($user, $idwarehouse);
+			$result=$object->set_draft($user, $idwarehouse);
+			if ($result<0) setEventMessage($object->error,'errors');
 
 			// Define output language
 			$outputlangs = $langs;
@@ -478,6 +480,7 @@ else if ($action == 'confirm_modif' && ((empty($conf->global->MAIN_USE_ADVANCED_
 else if ($action == 'confirm_paid' && $confirm == 'yes' && $user->rights->facture->paiement) {
 	$object->fetch($id);
 	$result = $object->set_paid($user);
+	if ($result<0) setEventMessage($object->error,'errors');
 } // Classif "paid partialy"
 else if ($action == 'confirm_paid_partially' && $confirm == 'yes' && $user->rights->facture->paiement) {
 	$object->fetch($id);
@@ -485,6 +488,7 @@ else if ($action == 'confirm_paid_partially' && $confirm == 'yes' && $user->righ
 	$close_note = $_POST["close_note"];
 	if ($close_code) {
 		$result = $object->set_paid($user, $close_code, $close_note);
+		if ($result<0) setEventMessage($object->error,'errors');
 	} else {
 		setEventMessage($langs->trans("ErrorFieldRequired", $langs->transnoentitiesnoconv("Reason")), 'errors');
 	}
@@ -495,6 +499,7 @@ else if ($action == 'confirm_canceled' && $confirm == 'yes') {
 	$close_note = $_POST["close_note"];
 	if ($close_code) {
 		$result = $object->set_canceled($user, $close_code, $close_note);
+		if ($result<0) setEventMessage($object->error,'errors');
 	} else {
 		setEventMessage($langs->trans("ErrorFieldRequired", $langs->transnoentitiesnoconv("Reason")), 'errors');
 	}
diff --git a/htdocs/compta/facture/class/facture.class.php b/htdocs/compta/facture/class/facture.class.php
index fb92a3b69e1637da23b87f08e5fbdb5ad6560dcd..096fee84d6ab2a48c0fe0eb3628bd4cdf9eab234 100644
--- a/htdocs/compta/facture/class/facture.class.php
+++ b/htdocs/compta/facture/class/facture.class.php
@@ -1564,7 +1564,11 @@ class Facture extends CommonInvoice
 				$interface=new Interfaces($this->db);
 				$result=$interface->run_triggers('BILL_CANCEL',$this,$user,$langs,$conf);
 				if ($result < 0) {
-					$error++; $this->errors=$interface->errors;
+					$error++; 
+					$this->errors=$interface->errors;
+					$this->db->rollback();
+					return -1;
+					
 				}
 				// Fin appel triggers
 
@@ -1808,7 +1812,6 @@ class Facture extends CommonInvoice
 		else
 		{
 			$this->db->rollback();
-			$this->error=$this->db->lasterror();
 			return -1;
 		}
 	}
@@ -2216,6 +2219,7 @@ class Facture extends CommonInvoice
 			}
 			else
 			{
+			    $this->error=$this->line->error;
 				$this->db->rollback();
 				return -1;
 			}
@@ -2286,7 +2290,7 @@ class Facture extends CommonInvoice
 		else
 		{
 			$this->db->rollback();
-			$this->error=$this->db->lasterror();
+			$this->error=$line->error;
 			return -1;
 		}
 	}
@@ -3570,8 +3574,12 @@ class FactureLigne  extends CommonInvoiceLine
 				include_once DOL_DOCUMENT_ROOT . '/core/class/interfaces.class.php';
 				$interface=new Interfaces($this->db);
 				$result = $interface->run_triggers('LINEBILL_INSERT',$this,$user,$langs,$conf);
-				if ($result < 0) {
-					$error++; $this->errors=$interface->errors;
+				if ($result < 0) 
+				{
+					$error++;
+					$this->errors=$interface->errors;
+					$this->db->rollback();
+					return -2;
 				}
 				// Fin appel triggers
 			}
@@ -3683,8 +3691,12 @@ class FactureLigne  extends CommonInvoiceLine
 				include_once DOL_DOCUMENT_ROOT . '/core/class/interfaces.class.php';
 				$interface=new Interfaces($this->db);
 				$result = $interface->run_triggers('LINEBILL_UPDATE',$this,$user,$langs,$conf);
-				if ($result < 0) {
-					$error++; $this->errors=$interface->errors;
+				if ($result < 0)
+				{
+					$error++;
+					$this->errors=$interface->errors;
+					$this->db->rollback();
+					return -2;
 				}
 				// Fin appel triggers
 			}
@@ -3721,8 +3733,12 @@ class FactureLigne  extends CommonInvoiceLine
 			include_once DOL_DOCUMENT_ROOT . '/core/class/interfaces.class.php';
 			$interface=new Interfaces($this->db);
 			$result = $interface->run_triggers('LINEBILL_DELETE',$this,$user,$langs,$conf);
-			if ($result < 0) {
-				$error++; $this->errors=$interface->errors;
+			if ($result < 0)
+			{
+					$error++;
+					$this->errors=$interface->errors;
+					$this->db->rollback();
+					return -1;
 			}
 			// Fin appel triggers
 
diff --git a/htdocs/compta/paiement/class/paiement.class.php b/htdocs/compta/paiement/class/paiement.class.php
index 93f5f017c446e38f81ad67e864409c53b11d35c8..0eea10bf510afa451cd3423185595a6d8348552c 100644
--- a/htdocs/compta/paiement/class/paiement.class.php
+++ b/htdocs/compta/paiement/class/paiement.class.php
@@ -221,7 +221,15 @@ class Paiement extends CommonObject
                             if (!in_array($invoice->type, $affected_types)) dol_syslog("Invoice ".$facid." is not a standard, nor replacement invoice, nor credit note, nor deposit invoice. We do nothing more.");
                             else if ($remaintopay) dol_syslog("Remain to pay for invoice ".$facid." not null. We do nothing more.");
                             else if ($mustwait) dol_syslog("There is ".$mustwait." differed payment to process, we do nothing more.");
-                            else $result=$invoice->set_paid($user,'','');
+                            else 
+                            {
+                                $result=$invoice->set_paid($user,'','');
+                                if ($result<0)
+                                {
+                                    $this->error=$invoice->error;
+                                    $error++;
+                                }
+                            }
 					    }
 					}
 					else
diff --git a/htdocs/core/triggers/interface_90_all_Demo.class.php-NORUN b/htdocs/core/triggers/interface_90_all_Demo.class.php-NORUN
index e3257e2bda864c7b3b0c8d1241346cb546dd68f1..093d3800a90607744d6d9d097238e3cff3f95fa3 100644
--- a/htdocs/core/triggers/interface_90_all_Demo.class.php-NORUN
+++ b/htdocs/core/triggers/interface_90_all_Demo.class.php-NORUN
@@ -396,6 +396,10 @@ class InterfaceDemo
             dol_syslog("Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id);
         }
         elseif ($action == 'BILL_DELETE')
+        {
+            dol_syslog("Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id);
+        }
+        elseif ($action == 'BILL_PAYED')
         {
             dol_syslog("Trigger '".$this->name."' for action '$action' launched by ".__FILE__.". id=".$object->id);
         }