Fourth parameter for %SUBDT is required when the third parameter for *SECONDS is greater than 2.
20
Cause . . . . . : When the third parameter for %SUBDT is greater than 2, the fourth parameter must be specified, with a value that is exactly 2 less than the third parameter.
Recovery . . . : Change the third parameter to 2, or add the fourth parameter.
Technical description . . . . . . . . : For *SECONDS, the third parameter represents the number of digits and the fourth parameter represents the number of decimal places.