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

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

Homogenous weight enumerator: w(x)=1x^0+238x^75+204x^76+210x^77+636x^78+216x^79+828x^80+990x^81+1722x^82+2208x^83+4334x^84+3168x^85+2220x^86+1022x^87+312x^88+186x^89+494x^90+132x^91+132x^92+234x^93+66x^94+36x^95+68x^96+12x^97+12x^98+2x^114

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 1.16 seconds.