The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+141x^36+76x^37+502x^38+176x^39+609x^40+268x^41+692x^42+256x^43+552x^44+164x^45+360x^46+80x^47+125x^48+4x^49+44x^50+43x^52+2x^54+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 0.461 seconds.