Fixed Max length and min length of a lintel set to increments

[arch_lon]

Hi there,

I've been trying to set up a basic lintel that I can use for structural layouts.

I've followed the

Setting the increments works fine which is great, but setting a min and max value to control my "Rounded Lintel Length" has no effect in limiting the size from 600 - 4800mm.

Can someone help me?

I've attached the family which I have modified from a downloaded family.