The generator matrix

 1  0  0  1  1  1  1  1
 0  1  0  6  1  7  3  4
 0  0  1  7  1  6  4  3

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

Homogenous weight enumerator: w(x)=1x^0+58x^12+216x^14+48x^15+216x^17+128x^18+54x^20+8x^21

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 0.000836 seconds.