The generator matrix

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

generates a code of length 51 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 99.

Homogenous weight enumerator: w(x)=1x^0+76x^99+114x^100+36x^101+336x^102+60x^103+18x^104+6x^105+42x^106+36x^108+4x^126

The gray image is a code over GF(3) with n=459, k=6 and d=297.
This code was found by Heurico 1.16 in 0.0486 seconds.