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

generates a code of length 36 over Z8 who´s minimum homogenous weight is 28.

Homogenous weight enumerator: w(x)=1x^0+178x^28+358x^30+32x^31+593x^32+224x^33+1094x^34+768x^35+1661x^36+768x^37+1146x^38+224x^39+630x^40+32x^41+322x^42+119x^44+24x^46+16x^48+1x^52+1x^60

The gray image is a code over GF(2) with n=144, k=13 and d=56.
This code was found by Heurico 1.16 in 1.89 seconds.