A purchase order that has never been activated can be deleted from the system by pressing the Delete button.
To cancel an active or part delivered purchase order press the [Cancel Order] button. It will close any open lines. If a line is part delivered the line will be split into the delivered and part delivered parts. Cancelling a purchase order will prevent further dispatches to be made and will change its status to ‘Deleted’
Note that it is also possible to close a purchase order from the Warehouse menu, purchase receipt. This is done if the store man considers "enough" product is delivered in cases where quantities ordered are approximate.