Description
In one of the recent builds there was an error with recalculate function causing this error and shipping costs to not add:
Notice: Undefined variable: shipping_cost in \www\includes\order_recalculate.php on line 120
Solution
http://www.viart.com/downloads/order_recalculate-4.2.1.zip
Download the file above and extract 'order_recalculate.php' in the /includes folder of your shop replacing existing file. Please do not forget to make a backup copy of the current file in case something goes wrong.