IKJ56345I `subsystem` SUBSYSTEM INTERFACE ERROR, RETURN CODE `return_code` + REENTER COMMAND, THEN IF ERROR CALL YOUR SYSTEM PROGRAMMER

Explanation
 A subsystem return code is either 4 (the subsystem
does not support the function) or 20 (logical error).

Module
 IKJCT462

Program
 OUTPUT

IKJ56345I subsystem SUBSYSTEM INTERFACE ERROR, RETURN CODE return_code + REENTER COMMAND, THEN IF ERROR CALL YOUR SYSTEM PROGRAMMER