The generator matrix

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

generates a code of length 39 over Z8 who´s minimum homogenous weight is 34.

Homogenous weight enumerator: w(x)=1x^0+383x^34+773x^36+1042x^38+799x^40+610x^42+399x^44+68x^46+12x^48+7x^50+2x^54

The gray image is a code over GF(2) with n=156, k=12 and d=68.
This code was found by Heurico 1.16 in 29.3 seconds.