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  3  1  1  1  1  1  1  1  3  1  1  1  3  1  1  1  1  1  3  3  3  1  3  1
 0  3  0  0  0  0  0  0  0  0  3  6  6  3  3  3  0  6  3  6  0  3  6  3  3  3  0  6  3  3  3  0  3  0  3  3  6  6  0  6  0  0  6  0  6  6  6  0  3  6  3  6  6  6  6  6  0  6  6  0  3  3  6  6  3  3  0  3  6  3  3  3  0  3  0  3  6  3  3  0  3  0  6  6  0  0  3  3  6  3  6
 0  0  3  0  0  0  0  3  6  6  6  0  0  6  3  6  3  0  3  3  6  0  0  3  6  3  3  3  6  6  3  0  3  0  3  0  3  0  6  6  0  6  0  3  6  6  3  3  3  0  0  3  0  3  3  6  6  6  6  6  0  0  6  6  0  0  3  6  6  3  3  3  6  0  3  3  0  3  3  3  0  3  3  6  0  0  0  0  0  0  0
 0  0  0  3  0  0  3  6  0  6  0  0  6  3  3  6  0  3  0  6  3  3  3  6  6  3  6  3  0  0  3  0  0  3  3  0  3  6  0  0  3  3  0  6  0  3  3  0  6  0  3  3  3  0  6  6  6  0  3  6  0  3  6  3  6  6  0  3  3  0  6  3  3  3  6  6  6  3  0  0  6  6  6  6  6  0  6  0  6  0  3
 0  0  0  0  3  0  6  6  3  0  6  6  6  0  6  6  0  6  3  0  3  6  0  6  3  6  0  6  0  0  3  3  6  6  3  6  6  6  3  3  3  0  3  3  0  6  0  0  6  6  0  0  3  3  3  6  6  6  3  3  0  6  0  0  3  6  6  3  0  0  3  0  6  0  3  0  3  0  3  3  6  3  6  0  3  3  6  0  3  6  0
 0  0  0  0  0  3  6  6  6  6  6  6  3  6  3  3  6  3  6  6  6  3  6  3  3  0  0  0  6  0  3  6  0  0  0  0  6  6  3  3  0  0  3  0  3  3  6  3  0  0  0  3  6  3  6  6  3  3  3  3  3  6  6  6  6  0  3  0  3  0  3  3  6  6  6  6  6  0  3  6  6  3  3  3  0  3  6  3  0  6  6

generates a code of length 91 over Z9 who´s minimum homogenous weight is 171.

Homogenous weight enumerator: w(x)=1x^0+262x^171+66x^174+192x^177+566x^180+474x^183+294x^186+212x^189+76x^198+28x^207+12x^216+2x^225+2x^252

The gray image is a code over GF(3) with n=273, k=7 and d=171.
This code was found by Heurico 1.16 in 0.44 seconds.