Which AS400 function allows you to log-line on vendor invoices?

The function that allows you to log-line on vendor invoices is OBBSI. This function is typically used within the AS400 system to handle invoice processing including logging and status updates. It provides the necessary interface for entering and managing vendor invoice data, ensuring that invoices are properly tracked and recorded in the system for accounting and operational purposes.

The other functions listed do not relate specifically to logging vendor invoices. For example, CLR and CLRE are associated with clearing and resetting processes, which do not pertain to invoice entry or management. OWOI, while potentially relevant to order processing, does not specifically address the logging of vendor invoices. Therefore, OBBSI is the correct choice for managing vendor invoice logging within the AS400 system.