I am getting this error all the time
"You must enter at least one line item for this transaction."
but i have filled the line item with a dummy non inventory item like below:
Sales Order Items : Item field with item name CP-MIGR-ITEM
Sales Order Items : Quantity field with item quantity 1
Sales Order Items : Amount field with Amount 10
Now i am not able to figure out, what's the problem. I have entered the line item why it is throwing the same error.