diff --git a/htdocs/core/lib/bank.lib.php b/htdocs/core/lib/bank.lib.php
index 736b200bea3..4e8d9969c3c 100644
--- a/htdocs/core/lib/bank.lib.php
+++ b/htdocs/core/lib/bank.lib.php
@@ -318,7 +318,7 @@ function getIbanHumanReadable(Account $account)
 {
 	if ($account->getCountryCode() == 'FR') {
 		require_once DOL_DOCUMENT_ROOT.'/includes/php-iban/oophp-iban.php';
-		$ibantoprint = preg_replace('/[^a-zA-Z0-9]/', '', $account->iban);
+		$ibantoprint = preg_replace('/[^a-zA-Z0-9]/', '', empty($account->iban)?'':$account->iban);
 		$iban = new PHP_IBAN\IBAN($ibantoprint);
 		return $iban->HumanFormat();
 	}
diff --git a/htdocs/core/tpl/objectline_view.tpl.php b/htdocs/core/tpl/objectline_view.tpl.php
index 153773a6519..182f15b5aa5 100644
--- a/htdocs/core/tpl/objectline_view.tpl.php
+++ b/htdocs/core/tpl/objectline_view.tpl.php
@@ -414,7 +414,7 @@ if ($outputalsopricetotalwithtax) {
 
 if ($this->statut == 0 && !empty($object_rights->creer) && $action != 'selectlines') {
 	$situationinvoicelinewithparent = 0;
-	if ($line->fk_prev_id != null && in_array($object->element, array('facture', 'facturedet'))) {
+	if (isset($line->fk_prev_id) && in_array($object->element, array('facture', 'facturedet'))) {
 		if ($object->type == $object::TYPE_SITUATION) {	// The constant TYPE_SITUATION exists only for object invoice
 			// Set constant to disallow editing during a situation cycle
 			$situationinvoicelinewithparent = 1;
diff --git a/htdocs/margin/agentMargins.php b/htdocs/margin/agentMargins.php
index e68576edd81..c209fb1f957 100644
--- a/htdocs/margin/agentMargins.php
+++ b/htdocs/margin/agentMargins.php
@@ -347,6 +347,12 @@ if ($result) {
 	}
 
 	// Show total margin
+	if (!isset($cumul_achat)) {
+		$cumul_achat = 0;
+	}
+	if (!isset($cumul_vente)) {
+		$cumul_vente = 0;
+	}
 	$totalMargin = $cumul_vente - $cumul_achat;
 
 	$marginRate = ($cumul_achat != 0) ? (100 * $totalMargin / $cumul_achat) : '';