The generator matrix

 1  0  0  1  1  1  1  1  6
 0  1  0  6  7  8  1  2  1
 0  0  1  7  5  8  4  3  8

generates a code of length 9 over Z9 who´s minimum homogenous weight is 15.

Homogenous weight enumerator: w(x)=1x^0+216x^15+294x^18+216x^21+2x^27

The gray image is a code over GF(3) with n=27, k=6 and d=15.
This code was found by Heurico 1.16 in 0.0122 seconds.