The generator matrix

 1  0  1  1  1  6  1  1
 0  1  3  6  5  1  0  6
 0  0  4  0  4  0  0  4
 0  0  0  4  4  4  4  4

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

Homogenous weight enumerator: w(x)=1x^0+33x^6+64x^7+61x^8+64x^9+30x^10+2x^12+1x^14

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 0.000444 seconds.