The generator matrix

 1  0  1  1  1  1  1  3  1  X  1  1  1  1  1 2X+3  1  1  0 2X  1  1  1  1
 0  1  1  8 X+3 X+2 2X+4  1  8  1  0 2X+4 X+8 2X+8  1  1 X+3 2X+8  1  1  4 2X X+4  3
 0  0 2X  0  3  3 2X+3 X+3 2X X+3 2X+6  6  X  3 X+6 X+6 2X+6 2X+6 2X+6  0  6 2X+6 X+6 X+6
 0  0  0  6  6  0  3  6  3  3  0  3  0  3  3  0  3  6  6  6  0  0  0  6

generates a code of length 24 over Z9[X]/(X^2+3,3X) who´s minimum homogenous weight is 42.

Homogenous weight enumerator: w(x)=1x^0+444x^42+972x^44+1522x^45+1458x^46+3888x^47+2536x^48+2916x^49+3888x^50+1732x^51+286x^54+38x^57+2x^60

The gray image is a code over GF(3) with n=216, k=9 and d=126.
This code was found by Heurico 1.16 in 0.36 seconds.