The generator matrix

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

generates a code of length 7 over Z8 who´s minimum homogenous weight is 4.

Homogenous weight enumerator: w(x)=1x^0+21x^4+32x^6+128x^7+67x^8+7x^12

The gray image is a code over GF(2) with n=28, k=8 and d=8.
This code was found by Heurico 1.16 in 0.000248 seconds.