The KEYCHECK option specifies whether the File Handler checks that the key definition defined in your application matches that of the indexed file you are opening.
KEYCHECK={ON|OFF} | ON | All key definitions must match; otherwise a 3/9 error is returned. |
| OFF | Open the file, regardless of whether key definitions match or not. Any explicit reference in the program to a key which does not match an actual key in the file, results in an error at the time of reference. |
| Default: | ON |