The generator matrix

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

generates a code of length 18 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 30.

Homogenous weight enumerator: w(x)=1x^0+286x^30+648x^32+760x^33+3402x^34+2592x^35+1426x^36+6804x^37+2592x^38+1048x^39+100x^42+4x^45+16x^48+4x^51

The gray image is a code over GF(3) with n=162, k=9 and d=90.
This code was found by Heurico 1.16 in 55.1 seconds.