The generator matrix

 1  1  1  1  1  1  1  1
 0  3  0  0  0  0  0  3
 0  0  3  0  0  0  0  6
 0  0  0  3  0  0  0  6
 0  0  0  0  3  0  0  6
 0  0  0  0  0  3  0  6
 0  0  0  0  0  0  3  6

generates a code of length 8 over Z9 who´s minimum homogenous weight is 6.

Homogenous weight enumerator: w(x)=1x^0+56x^6+112x^9+420x^12+560x^15+4374x^16+616x^18+336x^21+86x^24

The gray image is a code over GF(3) with n=24, k=8 and d=6.
This code was found by Heurico 1.16 in 0.013 seconds.