The generator matrix

 1  0  1  1  1  1  1 X+6  1  1 2X  1  1  1  0  1  1  1  1  1  1  1 X+6  1  1  1  1  1
 0  1 2X+7  8 X+6 X+1 X+5  1 2X+8 2X  1  7 2X+7  8  1  0 2X X+6 X+5 2X+8  0 X+6  1 X+1  0  7 2X 2X+7
 0  0  6  0  0  0  6  6  3  3  6  6  3  3  3  6  6  6  6  0  6  6  3  0  0  3  3  3
 0  0  0  3  0  3  6  3  3  6  0  3  6  3  0  0  0  6  3  0  6  6  0  3  0  3  6  0
 0  0  0  0  6  6  3  0  3  6  6  3  3  6  3  0  6  3  0  6  6  0  0  0  3  6  3  3

generates a code of length 28 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 48.

Homogenous weight enumerator: w(x)=1x^0+118x^48+18x^49+234x^50+336x^51+1224x^52+1044x^53+1176x^54+4698x^55+2106x^56+1840x^57+4680x^58+1440x^59+552x^60+72x^61+36x^62+70x^63+16x^66+12x^69+4x^72+6x^75

The gray image is a code over GF(3) with n=252, k=9 and d=144.
This code was found by Heurico 1.16 in 0.413 seconds.