The generator matrix

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

generates a code of length 10 over Z9 who´s minimum homogenous weight is 12.

Homogenous weight enumerator: w(x)=1x^0+60x^12+144x^15+546x^18+1212x^21+180x^24+20x^27+24x^30

The gray image is a code over GF(3) with n=30, k=7 and d=12.
This code was found by Heurico 1.16 in 0.00322 seconds.