This can occur when the Account is set to PO Mandatory, this should be de-ticked on the web tab of the location screen, or a PO should be added.
Error Message - An Order Number (not blank or Default Order) is required for this item
When amending an order for the day on a location, a service message is seen - An Order Number (not blank or Default Order)is required for this item. Other locations work without an issue.
Written by Emma