diff --git a/htdocs/accountancy/admin/card.php b/htdocs/accountancy/admin/card.php
index d555ed46092..51517993bb5 100644
--- a/htdocs/accountancy/admin/card.php
+++ b/htdocs/accountancy/admin/card.php
@@ -23,12 +23,14 @@
  * \brief		Card accounting account
  */
 require '../../main.inc.php';
-	
+
 // Class
 require_once DOL_DOCUMENT_ROOT.'/core/lib/accounting.lib.php';
 require_once DOL_DOCUMENT_ROOT.'/accountancy/class/accountingaccount.class.php';
 require_once DOL_DOCUMENT_ROOT.'/accountancy/class/html.formventilation.class.php';
 
+$error=0;
+
 // Langs
 $langs->load("bills");
 $langs->load("accountancy");
@@ -41,7 +43,7 @@ $rowid = GETPOST('rowid', 'int');
 // Security check
 if (!$user->admin)
     accessforbidden();
-	
+
 $accounting = new AccountingAccount($db);
 
 // Action
@@ -49,11 +51,11 @@ if ($action == 'add')
 {
 	if (! GETPOST('cancel', 'alpha')) {
 		$sql = 'SELECT pcg_version FROM ' . MAIN_DB_PREFIX . 'accounting_system WHERE rowid=' . $conf->global->CHARTOFACCOUNTS;
-		
+
 		dol_syslog('accountancy/admin/card.php:: $sql=' . $sql);
 		$result = $db->query($sql);
 		$obj = $db->fetch_object($result);
-		
+
 		$accounting->fk_pcg_version = $obj->pcg_version;
 		$accounting->pcg_type = GETPOST('pcg_type');
 		$accounting->pcg_subtype = GETPOST('pcg_subtype');
@@ -61,17 +63,17 @@ if ($action == 'add')
 		$accounting->account_parent = GETPOST('account_parent', 'int');
 		$accounting->label = GETPOST('label', 'alpha');
 		$accounting->active = 1;
-		
+
 		$res = $accounting->create($user);
-		
+
 		if ($res == 0) {
 		} else {
 			if ($res == - 3) {
-				$_error = 1;
+				$error = 1;
 				$action = "create";
 			}
 			if ($res == - 4) {
-				$_error = 2;
+				$error = 2;
 				$action = "create";
 			}
 		}
@@ -82,22 +84,22 @@ else if ($action == 'edit')
 {
 	if (! GETPOST('cancel', 'alpha')) {
 		$result = $accounting->fetch($id);
-		
+
 		$sql = 'SELECT pcg_version FROM ' . MAIN_DB_PREFIX . 'accounting_system WHERE rowid=' . $conf->global->CHARTOFACCOUNTS;
-		
+
 		dol_syslog('accountancy/admin/card.php:: $sql=' . $sql);
 		$result2 = $db->query($sql);
 		$obj = $db->fetch_object($result2);
-		
+
 		$accounting->fk_pcg_version = $obj->pcg_version;
 		$accounting->pcg_type = GETPOST('pcg_type');
 		$accounting->pcg_subtype = GETPOST('pcg_subtype');
 		$accounting->account_number = GETPOST('account_number', 'int');
 		$accounting->account_parent = GETPOST('account_parent', 'int');
 		$accounting->label = GETPOST('label', 'alpha');
-		
+
 		$result = $accounting->update($user);
-		
+
 		if ($result > 0) {
 			header("Location: " . $_SERVER["PHP_SELF"] . "?id=" . $id);
 			exit();
@@ -112,15 +114,15 @@ else if ($action == 'edit')
 else if ($action == 'delete')
 {
 	$result = $accounting->fetch($id);
-	
+
 	if (! empty($accounting->id)) {
 		$result = $accounting->delete($user);
-		
+
 		if ($result > 0) {
 			Header("Location: account.php");
 		}
 	}
-	
+
 	if ($result < 0) {
 		setEventMessage($accounting->error, 'errors');
 	}
@@ -137,7 +139,7 @@ $htmlacc = new FormVentilation($db);
 if ($action == 'create')
 {
 	print_fiche_titre($langs->trans('NewAccount'));
-	
+
 	print '<form name="add" action="' . $_SERVER["PHP_SELF"] . '" method="POST">' . "\n";
 	print '<input type="hidden" name="token" value="' . $_SESSION['newtoken'] . '">';
 	print '<input type="hidden" name="action" value="add">';
@@ -145,7 +147,7 @@ if ($action == 'create')
 	dol_fiche_head();
 
 	print '<table class="border" width="100%">';
-	
+
 	print '<tr><td width="25%">' . $langs->trans("AccountNumber") . '</td>';
 	print '<td><input name="account_number" size="30" value="' . $accounting->account_number . '"</td></tr>';
 	print '<tr><td>' . $langs->trans("Label") . '</td>';
@@ -162,7 +164,7 @@ if ($action == 'create')
 	print '<td>';
 	print $htmlacc->select_pcgsubtype($accounting->pcg_subtype, 'pcg_subtype');
 	print '</td></tr>';
-	
+
 	print '</table>';
 
 	dol_fiche_end();
@@ -172,35 +174,35 @@ if ($action == 'create')
 	print '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;';
 	print '<input class="button" type="submit" name="cancel" value="' . $langs->trans("Cancel") . '">';
 	print '</div>';
-	
+
 	print '</form>';
 }
 else if ($id)
 {
 	$rowid = $id;
 	$account = $accounting->fetch($rowid);
-	
+
 	if ($account > 0) {
 		dol_htmloutput_mesg($mesg);
-		
+
 		$head = accounting_prepare_head($accounting);
-		
+
 		if ($action == 'update')
 		{
 			$soc = new Societe($db);
 			if ($object->socid) {
 				$soc->fetch($object->socid);
 			}
-			
+
 			dol_fiche_head($head, 'card', $langs->trans('AccountAccounting'), 0, 'billr');
-			
+
 			print '<form name="update" action="' . $_SERVER["PHP_SELF"] . '" method="POST">' . "\n";
 			print '<input type="hidden" name="token" value="' . $_SESSION['newtoken'] . '">';
 			print '<input type="hidden" name="action" value="edit">';
 			print '<input type="hidden" name="id" value="' . $id . '">';
-			
+
 			print '<table class="border" width="100%">';
-			
+
 			print '<tr><td width="25%">' . $langs->trans("AccountNumber") . '</td>';
 			print '<td><input name="account_number" size="30" value="' . $accounting->account_number . '"</td></tr>';
 			print '<tr><td>' . $langs->trans("Label") . '</td>';
@@ -217,7 +219,7 @@ else if ($id)
 			print '<td>';
 			print $htmlacc->select_pcgsubtype($accounting->pcg_subtype, 'pcg_subtype');
 			print '</td></tr>';
-			
+
 			print '</table>';
 
 			dol_fiche_end();
@@ -227,71 +229,71 @@ else if ($id)
 			print '&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;';
 			print '<input type="submit" name="cancel" class="button" value="' . $langs->trans("Cancel") . '">';
 			print '</div>';
-			
+
 			print '</form>';
 		}
 		else
 		{
 			$linkback = '<a href="../admin/account.php">' . $langs->trans("BackToChartofaccounts") . '</a>';
-			
+
 			dol_fiche_head($head, 'card', $langs->trans('AccountAccounting'), 0, 'billr');
-			
+
 			print '<table class="border" width="100%">';
-			
+
 			// Account number
 			print '<tr><td width="25%">' . $langs->trans("AccountNumber") . '</td>';
 			print '<td>' . $accounting->account_number . '</td>';
 			print '<td align="right" width="25%">' . $linkback . '</td></tr>';
-			
+
 			print '<tr><td>' . $langs->trans("Label") . '</td>';
 			print '<td colspan="2">' . $accounting->label . '</td></tr>';
-			
+
 			$accp = new AccountingAccount($db);
 			if (! empty($accounting->account_parent)) {
 				$accp->fetch($accounting->account_parent, '');
 			}
 			print '<tr><td>' . $langs->trans("Accountparent") . '</td>';
 			print '<td colspan="2">' . $accp->account_number . ' - ' . $accp->label . '</td></tr>';
-			
+
 			print '<tr><td>' . $langs->trans("Pcgtype") . '</td>';
 			print '<td colspan="2">' . $accounting->pcg_type . '</td></tr>';
-			
+
 			print '<tr><td>' . $langs->trans("Pcgsubtype") . '</td>';
 			print '<td colspan="2">' . $accounting->pcg_subtype . '</td></tr>';
-			
+
 			print '<tr><td>' . $langs->trans("Active") . '</td>';
 			print '<td colspan="2">';
-			
+
 			if (empty($accounting->active)) {
 				print img_picto($langs->trans("Disabled"), 'switch_off');
 			} else {
 				print img_picto($langs->trans("Activated"), 'switch_on');
 			}
-			
+
 			print '</td></tr>';
-			
+
 			print '</table>';
 
 			dol_fiche_end();
-			
+
 			/*
 			 * Barre d'actions
 			 */
-			
+
 			print '<div class="tabsAction">';
-			
+
 			if ($user->admin) {
 				print '<a class="butAction" href="' . $_SERVER["PHP_SELF"] . '?action=update&id=' . $id . '">' . $langs->trans('Modify') . '</a>';
 			} else {
 				print '<a class="butActionRefused" href="#" title="' . dol_escape_htmltag($langs->trans("NotAllowed")) . '">' . $langs->trans('Modify') . '</a>';
 			}
-			
+
 			if ($user->admin) {
 				print '<a class="butActionDelete" href="' . $_SERVER["PHP_SELF"] . '?action=delete&id=' . $id . '">' . $langs->trans('Delete') . '</a>';
 			} else {
 				print '<a class="butActionRefused" href="#" title="' . dol_escape_htmltag($langs->trans("NotAllowed")) . '">' . $langs->trans('Delete') . '</a>';
 			}
-			
+
 			print '</div>';
 		}
 	}
diff --git a/htdocs/product/canvas/product/tpl/card_create.tpl.php b/htdocs/product/canvas/product/tpl/card_create.tpl.php
index b700764484d..3f5ebdcbc0b 100644
--- a/htdocs/product/canvas/product/tpl/card_create.tpl.php
+++ b/htdocs/product/canvas/product/tpl/card_create.tpl.php
@@ -42,7 +42,7 @@ $statutarray=array('1' => $langs->trans("OnSell"), '0' => $langs->trans("NotOnSe
 <tr>
 <td class="fieldrequired" width="20%"><?php echo $langs->trans("Ref"); ?></td>
 <td><input name="ref" size="40" maxlength="32" value="<?php echo $object->ref; ?>">
-<?php if ($_error == 1) echo $langs->trans("RefAlreadyExists"); ?>
+<?php if ($refalreadyexists == 1) echo $langs->trans("RefAlreadyExists"); ?>
 </td></tr>
 
 <tr>
diff --git a/htdocs/product/canvas/service/tpl/card_create.tpl.php b/htdocs/product/canvas/service/tpl/card_create.tpl.php
index 148b9164ac1..c9bb423d0a2 100644
--- a/htdocs/product/canvas/service/tpl/card_create.tpl.php
+++ b/htdocs/product/canvas/service/tpl/card_create.tpl.php
@@ -40,7 +40,7 @@ $statutarray=array('1' => $langs->trans("OnSell"), '0' => $langs->trans("NotOnSe
 <tr>
 <td class="fieldrequired" width="20%"><?php echo $langs->trans("Ref"); ?></td>
 <td><input name="ref" size="40" maxlength="32" value="<?php echo $object->ref; ?>">
-<?php if ($_error == 1) echo $langs->trans("RefAlreadyExists"); ?>
+<?php if ($refalreadyexists == 1) echo $langs->trans("RefAlreadyExists"); ?>
 </td></tr>
 
 <tr>
diff --git a/htdocs/product/card.php b/htdocs/product/card.php
index 65845a5dd2c..beb01758aad 100644
--- a/htdocs/product/card.php
+++ b/htdocs/product/card.php
@@ -53,7 +53,9 @@ if (! empty($conf->stock->enabled)) $langs->load("stocks");
 if (! empty($conf->facture->enabled)) $langs->load("bills");
 if (! empty($conf->productbatch->enabled)) $langs->load("productbatch");
 
-$mesg=''; $error=0; $errors=array(); $_error=0;
+$mesg=''; $error=0; $errors=array();
+
+$refalreadyexists=0;
 
 $id=GETPOST('id', 'int');
 $ref=GETPOST('ref', 'alpha');
@@ -468,7 +470,7 @@ if (empty($reshook))
                         {
                             $db->rollback();
 
-                            $_error++;
+                            $refalreadyexists++;
                             $action = "";
 
                             $mesg=$langs->trans("ErrorProductAlreadyExists",$object->ref);
@@ -477,7 +479,7 @@ if (empty($reshook))
                             $object->fetch($id);
                         }
                         else
-                        {
+                     {
                             $db->rollback();
                             if (count($object->errors))
                             {
@@ -816,7 +818,7 @@ else
         $tmpcode='';
 		if (! empty($modCodeProduct->code_auto)) $tmpcode=$modCodeProduct->getNextValue($object,$type);
         print '<td class="fieldrequired" width="20%">'.$langs->trans("Ref").'</td><td colspan="3"><input name="ref" size="32" maxlength="128" value="'.dol_escape_htmltag(GETPOST('ref')?GETPOST('ref'):$tmpcode).'">';
-        if ($_error)
+        if ($refalreadyexists)
         {
             print $langs->trans("RefAlreadyExists");
         }
diff --git a/htdocs/product/price.php b/htdocs/product/price.php
index b744d37ea06..d29df98ff31 100644
--- a/htdocs/product/price.php
+++ b/htdocs/product/price.php
@@ -43,7 +43,7 @@ if (! empty($conf->global->PRODUIT_CUSTOMER_PRICES)) {
 $langs->load("products");
 $langs->load("bills");
 
-$mesg=''; $error=0; $errors=array(); $_error=0;
+$mesg=''; $error=0; $errors=array();
 
 $id = GETPOST('id', 'int');
 $ref = GETPOST('ref', 'alpha');