RFC_INVALID_HANDLE
mediumRFC Connection Handle Is No Longer Valid
Module: RFC / Basis
What this means
RFC_INVALID_HANDLE occurs when code tries to use an RFC connection handle that has already been released, timed out, or was never properly initialised. This is primarily seen in programs using the low-level RFC API (RFC_OPEN_CONNECTION, RFC_CALL_AND_WAIT, etc.) rather than standard CALL FUNCTION ... DESTINATION. The handle becomes invalid when: the connection is explicitly closed but the handle variable is used again; the target system times out and closes the connection while the handle is still stored; or a handle obtained in one LUW (Logical Unit of Work) is used after a COMMIT WORK that implicitly released stateful RFC connections.
Review the RFC connection lifecycle in the program. Ensure handles are checked for validity before use and re-established if needed. For stateful RFC, be aware that COMMIT WORK releases the connection unless the RFC destination is configured for stateful sessions. Use SM59 to check destination settings. For modern code, prefer CALL FUNCTION DESTINATION over low-level RFC API calls.
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