Please Set The Receivables System Options for This Operating Unit

When generating draft invoices (PRC: Generate Draft Invoices) the following error is occurring: Please Set The Receivables System Options for This Operating Unit

Set the Item Validation Organization in the Order Management System options:

Switch to your Order Management Responsibility.

Navigate to Setup -> System Parameters -> Values.
Select the appropriate operating unit
Select the category “Generic Parameters”
Enter the value for the “Item Validation Organization” parameter.