Releasing Invoices Automatically 
Prerequisites
It is only possible to automatically release invoices if their blocking reasons are no longer valid. This can be the case for invoices blocked due to quantity, price, or schedule variance or due to quality inspection.
For more information, see
Validity of a BlockThese types of invoices do not usually require further processing and can be released automatically.
Procedure
Result
nn invoice(s) released.

You can have the system automatically release invoices in the background. You use program RMMR0200 for this. Let your system administrator know which variants should be created for the program and which jobs have to be defined.