The generator matrix

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

generates a code of length 8 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 12.

Homogenous weight enumerator: w(x)=1x^0+150x^12+54x^13+792x^14+510x^15+2970x^16+1440x^17+548x^18+54x^19+36x^20+6x^21

The gray image is a code over GF(3) with n=72, k=8 and d=36.
This code was found by Heurico 1.16 in 0.00822 seconds.