The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1
 0  3  0  0  0  0  0  0  0  0  3  3  3  3  6  6  6  3  6  0  6
 0  0  3  0  0  0  0  0  3  3  6  6  3  6  0  6  0  6  6  0  0
 0  0  0  3  0  0  0  3  6  6  6  3  3  6  0  0  6  0  3  6  0
 0  0  0  0  3  0  0  6  6  3  3  0  3  3  3  0  6  3  3  6  3
 0  0  0  0  0  3  0  6  3  6  3  6  0  0  6  3  6  6  3  3  6
 0  0  0  0  0  0  3  3  0  3  0  3  6  6  3  0  0  6  6  6  0

generates a code of length 21 over Z9 who´s minimum homogenous weight is 30.

Homogenous weight enumerator: w(x)=1x^0+126x^30+222x^33+214x^36+294x^39+4734x^42+396x^45+330x^48+162x^51+62x^54+6x^57+12x^60+2x^63

The gray image is a code over GF(3) with n=63, k=8 and d=30.
This code was found by Heurico 1.16 in 12.8 seconds.