The generator matrix

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

generates a code of length 12 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 20.

Homogenous weight enumerator: w(x)=1x^0+72x^20+24x^21+324x^22+294x^23+516x^24+648x^25+276x^26+20x^27+6x^29+6x^30

The gray image is a code over GF(3) with n=108, k=7 and d=60.
This code was found by Heurico 1.16 in 0.0024 seconds.