The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+210x^34+68x^35+644x^36+412x^37+1184x^38+976x^39+1919x^40+1592x^41+2314x^42+1676x^43+2054x^44+940x^45+1098x^46+408x^47+542x^48+64x^49+198x^50+8x^51+53x^52+18x^54+2x^56+2x^58+1x^60

The gray image is a code over GF(2) with n=168, k=14 and d=68.
This code was found by Heurico 1.16 in 46.2 seconds.