Getting error message when bulk fulfilling Sales Orders 'The number of bins entered (xx) is not equal to the item quantity (xx)'

If the items fulfilled have bins associated, the Location has to be selected on the line item of the sales order. This is because on manual fulfillment (clicking on 'Fulfill' on the sales order), Location can be selected manually.

 

When bulk fulfilling however, the Location does not get populated. Hence the system does not know where to assign location for the items.

 

The solution will be to manually select the Location on the line items on the sales order.