The generator matrix

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

generates a code of length 42 over Z8 who´s minimum homogenous weight is 34.

Homogenous weight enumerator: w(x)=1x^0+24x^34+8x^35+155x^36+56x^37+373x^38+168x^39+621x^40+280x^41+764x^42+280x^43+608x^44+168x^45+346x^46+56x^47+135x^48+8x^49+16x^50+11x^52+9x^54+3x^56+4x^58+2x^60

The gray image is a code over GF(2) with n=168, k=12 and d=68.
This code was found by Heurico 1.16 in 0.42 seconds.