The generator matrix

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

generates a code of length 7 over Z8 who´s minimum homogenous weight is 6.

Homogenous weight enumerator: w(x)=1x^0+1x^6+10x^7+1x^8+2x^9+1x^10

The gray image is a code over GF(2) with n=28, k=4 and d=12.
This code was found by Heurico 1.16 in 0.00013 seconds.