The generator matrix

 1  0  0  1  1  1  1  1  1  6  1  1 X+6  1 2X+3  1 2X  1  1  X  1  3  1  1  1 2X  1  1  1 2X  1  1  X  1  1  0  6  1  1  1 2X+3  1  1  1 X+3  1  1 X+3  1  1 2X+6 2X+6  1  1  1  X  1  1  1  6  1  1  1  1  1  3  1  1  1  1  1  1
 0  1  0  6  1  7  5  X  8  1 2X+7 2X+5  1 X+3  1 2X X+6 2X+3 2X+1  1 X+2  1  8  7  3  1 X+5 X+7 2X+2  1 2X+2 2X+6  1 X+1 X+8 2X+6  X  X  5 2X+1  1 X+2  5 X+4  1 2X+3 2X+6  1 X+8 X+6 2X+3  1 2X X+1  6  0  1 X+7 X+4  1 2X+5  3  1  3  6  1 2X+2 X+8  8 X+5 X+6 2X+1
 0  0  1 2X+7 2X+1  6 X+2 X+8 2X  1 2X+5  7  5 2X+3 X+6  4  1 2X+2 2X+4 X+1  8 2X X+3  2 X+7 2X+2  4  7  5  5 2X+6 X+4 X+8  X X+3  1  1  X  8  1  0 2X+8 X+4 X+1  1  3 2X+4 2X X+5  7  1 2X+3  X 2X+3 2X  1 2X+2 X+5  2 2X+7 2X+1 2X+2 X+1 X+2 X+3 X+3 2X+8 2X+7 2X+7 X+5 2X+1 X+2

generates a code of length 72 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 138.

Homogenous weight enumerator: w(x)=1x^0+860x^138+1380x^139+2010x^140+1870x^141+2160x^142+1410x^143+1990x^144+1422x^145+1206x^146+1298x^147+1068x^148+870x^149+800x^150+738x^151+336x^152+206x^153+36x^154+12x^159+8x^162+2x^165

The gray image is a code over GF(3) with n=648, k=9 and d=414.
This code was found by Heurico 1.16 in 1.05 seconds.