The generator matrix

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

generates a code of length 10 over Z8 who´s minimum homogenous weight is 8.

Homogenous weight enumerator: w(x)=1x^0+13x^8+56x^9+9x^10+32x^11+2x^12+8x^13+6x^14+1x^18

The gray image is a code over GF(2) with n=40, k=7 and d=16.
This code was found by Heurico 1.16 in 0.000506 seconds.