Index: /mods/wpsg_mod_rechnungen.class.php
===================================================================
--- /mods/wpsg_mod_rechnungen.class.php	(revision 8156)
+++ /mods/wpsg_mod_rechnungen.class.php	(revision 8157)
@@ -1267,5 +1267,5 @@
 			}
 			
-			if (!$bOK) throw new \Exception(__('Kein Produkt ausgewÀhlt!', 'wpsg'));
+			if (!$bOK && !$preview) throw new \Exception(__('Kein Produkt ausgewÀhlt!', 'wpsg'));
 			
 			$this->shop->view['output'] = $bOutput;
@@ -1332,7 +1332,8 @@
 			$oCalculation = new \wpsg\wpsg_calculation();			
 			$oCalculationOrder = \wpsg\wpsg_calculation::getOrderCalculation($order_id);
-						
+
 			$oCalculation->setTaxMode($oCalculationOrder->getTaxMode());
-			
+			$this->shop->view['oCalculationOrder'] = $oCalculationOrder;
+
 			foreach ($oCalculationOrder->getCountry() as $country) {