FCLOSE program instruction The IOSTAT real-valued function should be used to check for successful completion of a close operation. (The error code for File not opened will be returned if there was no file or window currently open on the specified logical unit.) Related Keywords ATTACH program instruction DETACH program instruction FOPEN program instruction FOPENR program instruction IOSTAT real-valued function KILL monitor command KILL program instruction eV+Language Reference Guide, v2.x, 18319-000 Rev A Page 218