The generator matrix

 1  1  1  1  1  1  1  1  1
 0  2  0  0  4  6  2  2  0
 0  0  2  0  6  6  6  4  0
 0  0  0  2  2  4  6  2  0

generates a code of length 9 over Z8 who´s minimum homogenous weight is 6.

Homogenous weight enumerator: w(x)=1x^0+42x^6+56x^7+21x^8+272x^9+21x^10+56x^11+42x^12+1x^18

The gray image is a code over GF(2) with n=36, k=9 and d=12.
This code was found by Heurico 1.16 in 0.0014 seconds.