1) First Export Sales Invoice to Desktop
2) Import Sales Invoice to Delivery Order which u stored at Desktop before
3) Once you Import it will Automatically will open Report Designer for Accounting. Here now go to Report Menu > Data > choose DeliveryOrders > Ok.
4) Now go open all DBText then choose to DeliveryOrders.
5) Now click Calc Tab > Look for Footer > Variable1.
6) Once you click Variable1> on the right colloum got OnCalc(Red Color), click on it. Then you can see some coding at down.
7) In the coding > Replace the SalesInvoice to DeliveryOrders.
8) After replace now click right on mouse and click Compile. You will see it will show message Compile Completed: 0 Errors. Its means you do it successfully.
9) Now Click Design Tab and Save it.
10) Then now you can use it, this RTM as Delivery Orders.