The generator matrix

 1  0  0  1  1  1  8  2
 0  1  0  0  9 11  1  2
 0  0  1  1  1  2  1  0
 0  0  0  2  4  6  6  2

generates a code of length 8 over Z16 who´s minimum homogenous weight is 5.

Homogenous weight enumerator: w(x)=1x^0+448x^5+1456x^6+8512x^7+11934x^8+8512x^9+1456x^10+448x^11+1x^16

The gray image is a code over GF(2) with n=64, k=15 and d=20.
This code was found by Heurico 1.16 in 46.7 seconds.