IKJ56700A ENTER 1 TO 4 DIGIT INTEGER +
ENTER 1 TO 4 CHARACTER NUMERIC VALUE TO WHICH PREVIOUS COMMAND RETURN CODE WILL BE COMPARED

Explanation
 The WHEN command was entered without a return
code or with an invalid return code.  (Parse prompts for the value.)

IKJ56700A ENTER 1 TO 4 DIGIT INTEGER +ENTER 1 TO 4 CHARACTER NUMERIC VALUE TO WHICH PREVIOUS COMMAND RETURN CODE WILL BE COMPARED