Thank you, I think I missed `-constraints`, then! I will give it a go and check out the generated file. I expected it to be turned on automatically. My bad! That said, I will check if it does the constraint checking properly. I hope it does!

I know, Erlang's ASN.1 compiler does it too, automatically. It is pretty awesome.

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Update: `-constraints` does work (`validConstraint = temp1 >= 10 && temp1 <= 20`)

I will try out more complex ones. :)