3758764 - Manage Billing Documents F0797: Generic Error When Custom Exit Blocks Invoice Cancellation

• In the Fiori app “Manage Billing Documents” (F0797), attempting to cancel a billing document results in the frontend message: “In the context of Data Services an unknown internal server error occurred.”
• Custom code to prevent invoice cancellations works in VF11 but fails in the Fiori app with the generic error above.

• SAP S/4HANA
• SAP S/4HANA Cloud Private Edition

manage billing documents, f0797, fiori billing, cancellation error, unknown internal server error, /iwfnd/error_log, flexible billing cancellation, sscui, vofm copying requirement, vofa, exit_saplv60a_002, vbfs, vf11, billing period check, on-premise vs public cloud , KBA , SD-FIO-BIL , Fiori UIs for Billing , Problem