The generator matrix

 1  0  1  1  1  0  1  1  0  1  4  1  1  6  1  1  1  4  1  2  1  6  1  6  1  1  0  0  1  1  1  4  1  4  1  0  1  1  0  2  1  1
 0  1  1  0  1  1  0  3  1  3  1  2  6  1  4  1  6  1  5  1  3  1  6  1  6  7  1  1  0  2  5  2  2  1  4  0  1  0  1  0  4  4
 0  0  2  0  0  0  0  0  2  6  2  0  4  6  4  2  2  2  4  0  0  2  2  4  6  4  2  2  4  2  2  6  2  4  0  4  4  6  6  2  4  0
 0  0  0  2  0  0  0  0  0  0  0  0  0  0  0  0  0  6  2  2  2  6  2  4  4  4  4  4  6  4  2  2  2  2  2  2  2  4  4  2  4  0
 0  0  0  0  2  0  0  6  4  6  2  2  0  2  6  6  2  4  2  0  4  4  0  2  4  2  4  2  4  2  0  2  6  6  2  4  6  4  6  4  2  4
 0  0  0  0  0  2  0  6  6  4  6  6  6  0  4  6  2  2  2  2  4  0  4  4  6  6  4  2  2  2  2  6  0  0  2  0  4  4  0  4  4  4
 0  0  0  0  0  0  2  0  0  0  4  2  2  4  6  4  6  4  2  6  2  6  0  2  0  6  4  2  2  0  4  0  4  2  0  0  6  4  2  0  0  2

generates a code of length 42 over Z8 who´s minimum homogenous weight is 31.

Homogenous weight enumerator: w(x)=1x^0+48x^31+150x^32+336x^33+505x^34+922x^35+1464x^36+2308x^37+3364x^38+4912x^39+6633x^40+7688x^41+8510x^42+7832x^43+6597x^44+5388x^45+3552x^46+2150x^47+1391x^48+858x^49+413x^50+240x^51+138x^52+54x^53+36x^54+18x^55+7x^56+6x^57+4x^58+6x^59+1x^60+2x^61+2x^64

The gray image is a code over GF(2) with n=168, k=16 and d=62.
This code was found by Heurico 1.16 in 91.1 seconds.