The generator matrix

 1  0  1  1  1  1  1  1  3  1  1  1  X  1  1  1  1  1  1  1  1
 0  1  1  8  3  2  0 2X+1  1 X+8 2X X+1  1 X+3 2X+2 X+3 X+4 X+2 2X+4  1  8
 0  0 2X  6 X+6 X+3 2X+6 X+6 X+6  X 2X+6 2X+3  X  3 X+3 2X X+6  6 2X+3 X+3 2X+3

generates a code of length 21 over Z9[X]/(X^2+3,3X) who´s minimum homogenous weight is 38.

Homogenous weight enumerator: w(x)=1x^0+528x^38+266x^39+486x^40+1668x^41+684x^42+972x^43+1602x^44+258x^45+48x^47+2x^48+42x^50+2x^54+2x^57

The gray image is a code over GF(3) with n=189, k=8 and d=114.
This code was found by Heurico 1.16 in 9.98 seconds.