Canceling a sales order line
You can cancel a line and identify it as lost business if you have the correct security in SA Operator Setup. Authorization must be obtained to cancel a line that is tied to a purchase order or warehouse transfer.
If a line is canceled on an order containing that line only and a backorder (-01) suffix, the backordered lines are transferred to the -00 suffix.
Note: If an error occurs when an order line is accessed in maintenance mode, this error
            might be displayed: Errors Exist: Can't Maintain Line; Set to Lost Business and
               Re-Add (6794). The error that caused the problem is displayed in the Error
            window. You cannot maintain the line. You must set it to lost business and create a new
            line.  
 
	     - Select r.
 - Click Maintain.
 - Specify the order number, and the click .
 - Click .
 - Select the line to cancel, and then click .
 - Specify a lost business reason, and then click .
 - Finish the order.