The generator matrix

 1  0  1  1  1  6  1  1  0  1  1  6  1  1  0  1  1  6  1  1  6  1  1  0  1  0  1  1  1  6  1  1  1  0  1  0  6  1  1  1
 0  1  3  6  1  1  0  3  1  6  5  1  0  3  1  6  5  1  0  3  1  6  5  1  5  1  6  0  3  1  6  6  6  1  3  1  1  0  0  0
 0  0  4  0  0  0  0  0  0  0  0  0  4  0  0  4  4  4  0  0  4  0  4  0  4  4  0  4  0  0  4  4  0  4  0  4  0  0  0  0
 0  0  0  4  0  0  0  0  0  0  0  0  0  0  0  0  0  4  4  4  4  4  4  0  4  0  4  4  4  0  4  0  4  0  4  4  4  0  0  0
 0  0  0  0  4  0  0  0  0  0  0  0  4  4  4  4  4  4  0  4  0  0  0  0  0  4  0  0  0  4  0  0  4  4  4  4  0  0  0  0
 0  0  0  0  0  4  0  0  0  0  0  4  0  4  4  0  4  4  4  0  4  0  0  0  0  4  4  4  4  0  4  0  0  0  4  0  0  0  0  0
 0  0  0  0  0  0  4  0  0  0  0  4  0  0  4  4  4  4  4  0  0  4  4  4  0  4  0  0  0  0  0  4  0  4  0  0  4  0  0  0
 0  0  0  0  0  0  0  4  0  0  4  0  0  0  4  0  4  0  0  0  4  4  4  4  4  4  0  4  0  4  0  0  0  0  4  0  4  4  4  0
 0  0  0  0  0  0  0  0  4  0  4  4  4  0  0  0  4  4  0  4  0  4  4  0  0  0  0  4  0  4  4  4  0  0  0  0  4  4  4  0
 0  0  0  0  0  0  0  0  0  4  4  4  4  4  4  4  0  0  0  0  4  0  0  4  4  4  0  0  4  4  4  0  4  0  4  0  0  4  4  0

generates a code of length 40 over Z8 who´s minimum homogenous weight is 28.

Homogenous weight enumerator: w(x)=1x^0+49x^28+41x^30+18x^31+194x^32+90x^33+407x^34+336x^35+1088x^36+960x^37+2050x^38+1668x^39+2580x^40+1668x^41+2072x^42+960x^43+1057x^44+336x^45+445x^46+90x^47+135x^48+18x^49+79x^50+14x^52+24x^54+2x^56+2x^58

The gray image is a code over GF(2) with n=160, k=14 and d=56.
This code was found by Heurico 1.16 in 5.28 seconds.