The generator matrix

 1  0  0  1  1  1  1
 0  1  0  1  0  6  8
 0  0  1  8  8  7  2
 0  0  0  6  3  0  6

generates a code of length 7 over Z9 who´s minimum homogenous weight is 9.

Homogenous weight enumerator: w(x)=1x^0+52x^9+162x^10+234x^12+648x^13+342x^15+648x^16+100x^18

The gray image is a code over GF(3) with n=21, k=7 and d=9.
This code was found by Heurico 1.13 in 0.015 seconds.