Thank you so much!! It worked 
Although, why is there an error on the solid union?
the problem comes from the Target Range of the Remap Numbers:
Distance values are remapped between 0 and 1, so you will end up with both a 0 and a 1 in your final remapped list
when you multiply those remapped distance values to increase the boxes size, 0 times 6 still gives zero 
so you end up with a box that should have x,y,z sizes equal to 0, with this particular seed it’s at index 27:
if you remove the item at index 27, Solid Union won’t throw the error:
you could actually change the original Remap Numbers Target Range into something like “1 To 0.0001” to get a very small box out of the most distant point, and avoid the error on Solid Union:
Thankyou! Perfectly explained