diff --git a/Makefile b/Makefile
index 849f9de6bb49f60368945f72a578fccfc9fce53a..b31e9be4e90280e22bde140141ca6a0a90746d78 100644
--- a/Makefile
+++ b/Makefile
@@ -1,7 +1,7 @@
 BASE=ordernumbers
 PLATTFORM=woocommerce
 VENDOR=opentools
-VERSION=1.3.1
+VERSION=1.3.2
 DIR = $(shell pwd)
 SVNDIR=wordpress-plugin-svn
 
diff --git a/ordernumbers_woocommerce.php b/ordernumbers_woocommerce.php
index ce88d6601767c96ebec9430262c31a6071c7f540..82a2ff4f2ad85bf7a75afb8bc55588ddeea4dcf2 100644
--- a/ordernumbers_woocommerce.php
+++ b/ordernumbers_woocommerce.php
@@ -12,6 +12,31 @@ if ( ! defined( 'ABSPATH' ) ) {
 if (!class_exists( 'OpenToolsOrdernumbersBasic' )) 
 	require_once (dirname(__FILE__) . '/ordernumbers_woocommerce_basic.php');
 	
+	
+/* 
+* RK: This debugging function is taken from the debug_backtrace documentation page of php.net: 
+* Send the output from a backtrace to the error_log 
+* @param string $message Optional message that will be sent the the error_log before the backtrace 
+*/ 
+function log_trace($message = '') { 
+    $trace = debug_backtrace(); 
+    if ($message) { 
+        error_log($message); 
+    } 
+    $caller = array_shift($trace); 
+    $function_name = $caller['function']; 
+    error_log(sprintf('%s: Called from %s:%s', $function_name, $caller['file'], $caller['line'])); 
+    foreach ($trace as $entry_id => $entry) { 
+        $entry['file'] = $entry['file'] ? : '-'; 
+        $entry['line'] = $entry['line'] ? : '-'; 
+        if (empty($entry['class'])) { 
+            error_log(sprintf('%s %3s. %s() %s:%s', $function_name, $entry_id + 1, $entry['function'], $entry['file'], $entry['line'])); 
+        } else { 
+            error_log(sprintf('%s %3s. %s->%s() %s:%s', $function_name, $entry_id + 1, $entry['class'], $entry['function'], $entry['file'], $entry['line'])); 
+        } 
+    } 
+} 
+
 class OpenToolsOrdernumbers extends OpenToolsOrdernumbersBasic {
 	/**
 	 * Construct the plugin object
@@ -373,8 +398,10 @@ class OpenToolsOrdernumbers extends OpenToolsOrdernumbersBasic {
 	 * Filter to return the invoice number => simply return the first argument unchanged (was already 
 	 * created in the correct format, no need to format it now again) 
 	 */
-	function thirdparty_wpo_wcpdf_invoice_number($invoice_number, $order_number, $order_id, $order_data) {
-		$nr = $this->get_or_create_number($order_id, $order_data, 'invoice');
+	function thirdparty_wpo_wcpdf_invoice_number($invoice_number, $order_number, $order_id, $order_date) {
+		$_of = new WC_Order_Factory();  
+		$order = $_of->get_order($order_id);
+		$nr = $this->get_or_create_number($order_id, $order, 'invoice');
 		if ($nr == $order_id) {
 			// No number was found, so the default is the order id => reset to invoice number
 			return $invoice_number;
@@ -423,7 +450,6 @@ class OpenToolsOrdernumbers extends OpenToolsOrdernumbersBasic {
 		if (!$this->invoicenumbers_activated()) {
 			$wp_settings_fields['wpo_wcpdf_template_settings']['invoice']['display_number']['args']['description'] = '<i>' . sprintf($this->helper->__( 'The Open Tools Ordernumbers plugin is installed, but not configured to create invoice numbers. Configure it <a href="%s">here</a> to create invoice numbers.'), $this->invoicenumbers_config_link()) . '</i>';
 		}
-		return $settings;
 	}
 
 
diff --git a/readme.txt b/readme.txt
index 36330853d45595a1060f05ead1efe03c00960c7b..246b990fb09d9249bf4a95222d78d6977725f9e9 100644
--- a/readme.txt
+++ b/readme.txt
@@ -4,7 +4,7 @@ Contributors: opentools
 Tags: WooCommerce, Order numbers, orders
 Requires at least: 4.0
 Tested up to: 4.5
-Stable tag: 1.3.1
+Stable tag: 1.3.2
 License: GPLv3 or later
 License URI: http://www.gnu.org/licenses/gpl.html
 
diff --git a/releases/opentools-woocommerce-ordernumbers-advanced_v1.3.2.zip b/releases/opentools-woocommerce-ordernumbers-advanced_v1.3.2.zip
new file mode 100644
index 0000000000000000000000000000000000000000..c2e93e89439c324091cd471778efa7b6116069ad
Binary files /dev/null and b/releases/opentools-woocommerce-ordernumbers-advanced_v1.3.2.zip differ
diff --git a/releases/opentools-woocommerce-ordernumbers-basic_v1.3.2.zip b/releases/opentools-woocommerce-ordernumbers-basic_v1.3.2.zip
new file mode 100644
index 0000000000000000000000000000000000000000..83ac661b1e733bd6d0be0658f627f5d9c4d9e549
Binary files /dev/null and b/releases/opentools-woocommerce-ordernumbers-basic_v1.3.2.zip differ
diff --git a/woocommerce-advanced-ordernumbers.php b/woocommerce-advanced-ordernumbers.php
index 38e9e496e966c216b47f12f0729bcf4286539943..7d8820042baafc3cf79015d5cebb638f9241a684 100644
--- a/woocommerce-advanced-ordernumbers.php
+++ b/woocommerce-advanced-ordernumbers.php
@@ -3,15 +3,15 @@
  * Plugin Name: Woocommerce Advanced Ordernumbers
  * Plugin URI: http://open-tools.net/woocommerce/advanced-ordernumbers-for-woocommerce.html
  * Description: Lets the user freely configure the order numbers in WooCommerce.
- * Version: 1.3.1
+ * Version: 1.3.2
  * Author: Open Tools
  * Author URI: http://open-tools.net
  * Text Domain: woocommerce-advanced-ordernumbers
  * Domain Path: 
  * License: GPL2+
  * Network: true
- WC requires at least: 2.2
-WC tested up to: 2.5
+ * WC requires at least: 2.2
+ * WC tested up to: 2.5
 */
 
 if ( ! defined( 'ABSPATH' ) ) { 
diff --git a/woocommerce-basic-ordernumbers.php b/woocommerce-basic-ordernumbers.php
index ca12c7ee0f1ecc8f567c747f1de5b20937428b8c..d3f5fa8d639f24185db94795912ced51562faf01 100644
--- a/woocommerce-basic-ordernumbers.php
+++ b/woocommerce-basic-ordernumbers.php
@@ -3,14 +3,14 @@
  * Plugin Name: WooCommerce Basic Ordernumbers
  * Plugin URI: http://open-tools.net/woocommerce/advanced-ordernumbers-for-woocommerce.html
  * Description: Configure WooCommerce ordernumbers to have a running counter and arbitrary, fixed text (prefix / postfix).
- * Version: 1.3.1
+ * Version: 1.3.2
  * Author: Open Tools
  * Author URI: http://open-tools.net
  * Text Domain: woocommerce-advanced-ordernumbers
  * License: GPL2+
  * Network: true
- WC requires at least: 2.2
-WC tested up to: 2.5
+ * WC requires at least: 2.2
+ * WC tested up to: 2.5
 */
 
 if ( ! defined( 'ABSPATH' ) ) {