DAJ983E The GDG limit value must be either blank or a number in the range of 1-255 | 999
Explanation
An invalid value was entered in the GDG limit field.
User response
Enter a numeric value between 1 and either 255 or 999 as the GDG limit for this
Discard DSN, or leave this field blank. The upper limit of the range is 255 for z/OS® 2.1 and earlier, and 999 for z/OS 2.2
and later. If this field is left blank, the GDG limit set in the job profile (on the Generation
Options screen) applies.