This is a common error when account assignment category was left blank in the customer master. It then got copied into the SD documents created for the customer (inquiry -> quotation -> sales order), eventually leading to a blank account assignment category in the billing document.
If you now go back to the customer master and enter it, it will only ensure SD documents subsequently created will be OK. Existing SD documents, created before you fix the customer master, have already been created with a blank account assignment category. You will need to change the billing document (using transaction VF02), go to its header (menu option Goto -> Header -> Header) and switch the account assignment category field to "01 Domestic Revenue". After saving the changes, click on the green flag icon to release it to accounting. That will generate the accounting document.
You must be a registered user to add a comment. If you've already registered, sign in. Otherwise, register and sign in.