SAP Sales and Distribution
VF147 : No open billing quantity has been determined error message is issued while creating billing document with reference to sales order.
Reason and Analysis
This standard error message is issued when there is no open quantity for billing.
Open quantity for billing is determined based on the copy control configuration (VTFA) between sales order and Billing document.
Path : SPRO --> Sales and distribution
Generally for Sales order related billing this indicator is set to A , and for third party service scenario set to E.