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

generates a code of length 42 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 72.

Homogenous weight enumerator: w(x)=1x^0+82x^72+132x^74+196x^75+324x^77+512x^78+750x^80+1280x^81+2916x^82+1062x^83+2290x^84+5832x^85+1182x^86+1672x^87+708x^89+260x^90+210x^92+152x^93+6x^95+46x^96+34x^99+22x^102+2x^105+8x^108+4x^111

The gray image is a code over GF(3) with n=378, k=9 and d=216.
This code was found by Heurico 1.16 in 1.34 seconds.