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

generates a code of length 48 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 90.

Homogenous weight enumerator: w(x)=1x^0+488x^90+108x^92+672x^93+324x^94+432x^95+2574x^96+648x^97+432x^98+458x^99+168x^102+162x^105+86x^108+6x^111+2x^135

The gray image is a code over GF(3) with n=432, k=8 and d=270.
This code was found by Heurico 1.16 in 11.7 seconds.