The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  2  2  1  1  1  1  1  2  0  1  1  2  1  1  1  1  1  2
 0  2  0  0  0  0  0  0  0  0  0  0  0  0  0  4  4  4  4  4  4  2  2  2  2  6  6  2  6  2  2  2  6  0  6  6  0  6  4  0
 0  0  2  0  0  0  0  0  0  0  0  4  6  2  2  0  6  2  6  4  6  2  6  0  2  2  4  6  6  0  4  4  0  0  2  6  2  4  6  4
 0  0  0  2  0  0  0  0  0  0  0  6  6  6  4  2  2  0  4  2  6  6  4  4  4  0  2  2  6  6  0  2  6  2  2  6  0  4  6  2
 0  0  0  0  2  0  0  4  6  2  2  2  4  6  2  2  2  4  6  0  0  0  6  4  0  4  2  2  4  6  6  2  4  0  6  2  4  6  6  4
 0  0  0  0  0  2  0  6  6  6  4  0  0  0  0  0  6  6  6  4  2  2  6  2  0  4  2  4  4  0  4  4  4  4  0  6  6  2  0  6
 0  0  0  0  0  0  2  2  4  6  2  0  0  0  0  6  0  2  6  6  4  0  4  4  2  4  0  2  0  6  6  2  4  6  4  0  0  0  6  2

generates a code of length 40 over Z8 who´s minimum homogenous weight is 30.

Homogenous weight enumerator: w(x)=1x^0+276x^30+791x^32+1202x^34+48x^35+2210x^36+880x^37+4482x^38+3168x^39+6528x^40+3168x^41+4608x^42+880x^43+2318x^44+48x^45+1244x^46+608x^48+206x^50+87x^52+14x^54+1x^68

The gray image is a code over GF(2) with n=160, k=15 and d=60.
This code was found by Heurico 1.16 in 32.3 seconds.