The first parameter for the KEYED keyword must be *CHAR; *CHAR is assumed.
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Cause . . . . . : For a free-form file declaration of a program-described file, you can only specify an alphanumeric key.
Recovery . . . : Correct the parameter for the KEYED keyword. Compile again.
Technical description . . . . . . . . : If you want to use a different type of key, define the key in a data structure, and specify the data structure as the search argument for your keyed file operations.