The generator matrix

 1  1  1  1  1  1  1  1
 0  3  0  3  6  0  3  6
 0  0  3  6  0  6  3  3

generates a code of length 8 over Z9[X]/(X^2+6,3X) who´s minimum homogenous weight is 15.

Homogenous weight enumerator: w(x)=1x^0+16x^15+216x^16+8x^18+2x^24

The gray image is a code over GF(3) with n=72, k=5 and d=45.
This code was found by Heurico 1.16 in 0.000251 seconds.