The generator matrix

 1  0  0  0  1  1  1  2 10  1 12  1  1  1 14 12 14  0  1  1 14  1 12  1  1  1  1  1  1  0  1 12  2  8  1 14  1 14  1  1  1 14 12  0  1  1 14  6  1  1  8 12  1 10 12  1
 0  1  0  0  0  9  5  1  1  8  1  4  7 11  0  1 10 10 14  5  8 10  1 12  3  6 14  5  2  1  5  6  1 10 15  1 15  1 12  8  4  1  1  2 10  9  1  0  0 12  4 10  8  1  1  8
 0  0  1  0  1  1  4  5  2 10  3  3 12  5  1  5  1 14 15 11  1 14  0 14  6 10  8  2  7  2  7  0 13  1  9 11 12 12  4  6  1  6  5  1  6  8  1  1  1  1  6  1 15  4 14  0
 0  0  0  1  1  4  1  1 15  9  6 10 14 11  9  5  3  1 15  3  4  7  3 11  5  6  7  0 14 12  2  1 14  0  9  0 11  2  0  4  2 15  7 10 12 14  8  1  4  7  1  9 11  0  2  4
 0  0  0  0 12  0  0  0  0  0  0  0  0  0  0  0  0  0  0  8  8  8  8  8  8  8  8 12  4  4 12 12  4 12  4  4 12  4  4 12  4 12 12 12  8 12  4  4  4  8  4  8  4 12 12  0

generates a code of length 56 over Z16 who´s minimum homogenous weight is 48.

Homogenous weight enumerator: w(x)=1x^0+248x^48+1144x^49+3591x^50+6688x^51+13231x^52+20092x^53+29467x^54+35634x^55+40308x^56+36878x^57+31113x^58+20170x^59+12709x^60+6090x^61+2869x^62+1162x^63+490x^64+106x^65+92x^66+22x^67+16x^68+10x^69+4x^70+4x^71+5x^72

The gray image is a code over GF(2) with n=448, k=18 and d=192.
This code was found by Heurico 1.16 in 499 seconds.