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

generates a code of length 91 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 171.

Homogenous weight enumerator: w(x)=1x^0+390x^171+1004x^174+162x^176+1286x^177+162x^178+1458x^179+2892x^180+648x^181+2430x^182+4354x^183+648x^184+1782x^185+958x^186+530x^189+394x^192+310x^195+184x^198+62x^201+20x^204+6x^207+2x^252

The gray image is a code over GF(3) with n=819, k=9 and d=513.
This code was found by Heurico 1.16 in 3.49 seconds.