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

generates a code of length 91 over Z9[X]/(X^2+3,3X) who´s minimum homogenous weight is 174.

Homogenous weight enumerator: w(x)=1x^0+166x^174+84x^175+54x^176+276x^177+672x^178+216x^179+246x^180+1458x^181+216x^182+1580x^183+1002x^184+108x^186+78x^187+122x^189+46x^192+48x^193+84x^195+60x^196+18x^198+24x^201+2x^264

The gray image is a code over GF(3) with n=819, k=8 and d=522.
This code was found by Heurico 1.16 in 50.8 seconds.