The generator matrix

 1  0  1  1  1  1  1 X+3  1  1  1  0  1  1  1 2X  1  1  1  1  1  1 X+3 2X  1  1  1  1  1  1  1
 0  1 2X+4  8 X+1 X+3 X+2  1  0 2X+4  8  1 2X  4 2X+8  1 X+1 X+3 2X  4 X+2 2X+8  1  1  6 X+6 2X+6 2X+7 X+7  7  6
 0  0  3  0  6  3  6  6  6  0  3  3  3  6  6  6  3  6  0  0  3  0  3  0  3  0  6  6  0  3  6

generates a code of length 31 over Z9[X]/(X^2+3,3X) who´s minimum homogenous weight is 58.

Homogenous weight enumerator: w(x)=1x^0+108x^58+294x^59+114x^60+432x^61+396x^62+86x^63+432x^64+270x^65+38x^66+12x^68+4x^75

The gray image is a code over GF(3) with n=279, k=7 and d=174.
This code was found by Heurico 1.16 in 0.0107 seconds.