The generator matrix

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

generates a code of length 8 over Z8 who´s minimum homogenous weight is 4.

Homogenous weight enumerator: w(x)=1x^0+268x^4+768x^5+4032x^6+5376x^7+11878x^8+5376x^9+4032x^10+768x^11+268x^12+1x^16

The gray image is a code over GF(2) with n=32, k=15 and d=8.
This code was found by Heurico 1.16 in 51.9 seconds.