The generator matrix

 1  0  1  1  1  1  1  0
 0  1  1  8  0  7  8  1
 0  0  6  0  3  6  3  0
 0  0  0  3  3  6  6  3

generates a code of length 8 over Z9 who´s minimum homogenous weight is 12.

Homogenous weight enumerator: w(x)=1x^0+92x^12+320x^15+296x^18+16x^21+4x^24

The gray image is a code over GF(3) with n=24, k=6 and d=12.
This code was found by Heurico 1.16 in 0.000783 seconds.