why jobstep can't be more than 255 and for GDG has max
limit 255 . Is there any relation between the two

Answer Posted / guest

255 is the highest value a byte could have. So 255 decimal
is "FF" in hexa.
Internal routins for accessing and handling Datasets,
written by IBM, are using ContolBlocks.
Some contents are stored in only one byte. And so, the
highest value could only be 255.

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