The generator matrix

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

generates a code of length 42 over Z8 who´s minimum homogenous weight is 36.

Homogenous weight enumerator: w(x)=1x^0+66x^36+206x^37+265x^38+460x^39+420x^40+570x^41+373x^42+460x^43+325x^44+364x^45+231x^46+158x^47+78x^48+74x^49+23x^50+8x^51+5x^52+2x^53+4x^54+2x^55+1x^56

The gray image is a code over GF(2) with n=168, k=12 and d=72.
This code was found by Heurico 1.16 in 0.345 seconds.