The generator matrix

 1  0  1  1  1  1  1
 0  1  7  8  3  4  6

generates a code of length 7 over Z9 who´s minimum homogenous weight is 12.

Homogenous weight enumerator: w(x)=1x^0+14x^12+12x^13+18x^14+26x^15+6x^16+4x^18

The gray image is a code over GF(3) with n=21, k=4 and d=12.
This code was found by Heurico 1.16 in 8.7e-005 seconds.