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

generates a code of length 54 over Z9[X]/(X^2+3,3X) who´s minimum homogenous weight is 99.

Homogenous weight enumerator: w(x)=1x^0+564x^99+1182x^102+324x^104+1182x^105+1944x^106+1296x^107+5398x^108+3888x^109+1296x^110+1086x^111+804x^114+422x^117+210x^120+66x^123+12x^126+6x^129+2x^153

The gray image is a code over GF(3) with n=486, k=9 and d=297.
This code was found by Heurico 1.16 in 3.15 seconds.