The generator matrix

 1  0  1  1  1  4  2  1
 0  1  1  4  3  1  2  4
 0  0  2  6  4  6  2  0

generates a code of length 8 over Z8 who´s minimum homogenous weight is 6.

Homogenous weight enumerator: w(x)=1x^0+40x^6+40x^7+113x^8+16x^9+32x^10+8x^11+6x^12

The gray image is a code over GF(2) with n=32, k=8 and d=12.
This code was found by Heurico 1.16 in 0.000454 seconds.