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

generates a code of length 42 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 75.

Homogenous weight enumerator: w(x)=1x^0+420x^75+1056x^78+324x^80+1190x^81+2430x^82+1296x^83+4228x^84+4860x^85+1296x^86+1250x^87+808x^90+406x^93+104x^96+6x^99+4x^102+2x^105+2x^117

The gray image is a code over GF(3) with n=378, k=9 and d=225.
This code was found by Heurico 1.16 in 2.43 seconds.