The generator matrix

 1  1  1  X  1  1  1
 0  X 2X  X  0  0  0
 0  0  3  0  0  0  3
 0  0  0  6  0  0  3
 0  0  0  0  3  0  3
 0  0  0  0  0  3  6

generates a code of length 7 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 6.

Homogenous weight enumerator: w(x)=1x^0+60x^6+214x^9+3558x^12+8748x^14+6618x^15+442x^18+42x^21

The gray image is a code over GF(3) with n=63, k=9 and d=18.
This code was found by Heurico 1.16 in 0.037 seconds.