The generator matrix

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

generates a code of length 36 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 72.

Homogenous weight enumerator: w(x)=1x^0+236x^72+4x^81+2x^90

The gray image is a code over GF(3) with n=324, k=5 and d=216.
This code was found by Heurico 1.16 in 0.00973 seconds.