The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+45x^34+96x^35+235x^36+282x^37+612x^38+434x^39+1028x^40+696x^41+1284x^42+768x^43+1096x^44+484x^45+546x^46+204x^47+175x^48+72x^49+63x^50+32x^51+21x^52+2x^53+10x^54+2x^55+4x^56

The gray image is a code over GF(2) with n=168, k=13 and d=68.
This code was found by Heurico 1.16 in 1.8 seconds.