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

generates a code of length 29 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 54.

Homogenous weight enumerator: w(x)=1x^0+74x^54+864x^56+112x^57+972x^59+6x^63+108x^65+48x^66+2x^84

The gray image is a code over GF(3) with n=261, k=7 and d=162.
This code was found by Heurico 1.16 in 0.0183 seconds.