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

generates a code of length 90 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 171.

Homogenous weight enumerator: w(x)=1x^0+74x^171+84x^172+286x^174+108x^175+648x^176+310x^177+42x^178+1296x^179+78x^180+3000x^181+156x^183+36x^184+92x^186+42x^187+36x^189+30x^190+78x^192+18x^193+102x^195+24x^196+18x^199+2x^264

The gray image is a code over GF(3) with n=810, k=8 and d=513.
This code was found by Heurico 1.16 in 0.781 seconds.