The generator matrix

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

generates a code of length 39 over Z8 who´s minimum homogenous weight is 31.

Homogenous weight enumerator: w(x)=1x^0+128x^31+393x^32+734x^33+1342x^34+1966x^35+2502x^36+3132x^37+3976x^38+4336x^39+3803x^40+3422x^41+2831x^42+1868x^43+1149x^44+618x^45+291x^46+144x^47+85x^48+28x^49+7x^50+6x^51+1x^52+2x^53+1x^54+2x^56

The gray image is a code over GF(2) with n=156, k=15 and d=62.
This code was found by Heurico 1.16 in 16.5 seconds.