This routine unlocks any locked records held by the current process in the specified file. It is not an error to call this routine when there are no locked records. This routine does not affect the current file position. This routine will not unlock any records if it is called during a transaction. "Commit" should be used instead.
R-UNLOCK-FUNCTION has only one parameter: file_handle. File_handle must be a valid file handle returned by R-OPEN-FUNCTION.