The generator matrix

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

generates a code of length 58 over Z16 who´s minimum homogenous weight is 49.

Homogenous weight enumerator: w(x)=1x^0+42x^49+425x^50+1658x^51+3873x^52+7486x^53+13180x^54+19944x^55+29106x^56+35202x^57+39287x^58+35688x^59+30163x^60+20226x^61+13400x^62+7006x^63+3017x^64+1502x^65+574x^66+228x^67+78x^68+36x^69+10x^70+2x^71+2x^73+4x^74+2x^75+2x^80

The gray image is a code over GF(2) with n=464, k=18 and d=196.
This code was found by Heurico 1.16 in 521 seconds.