The generator matrix

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

generates a code of length 63 over Z16 who´s minimum homogenous weight is 58.

Homogenous weight enumerator: w(x)=1x^0+74x^58+258x^59+535x^60+476x^61+543x^62+344x^63+601x^64+486x^65+454x^66+192x^67+68x^68+28x^69+16x^70+4x^71+2x^72+2x^73+5x^74+2x^75+3x^78+1x^82+1x^92

The gray image is a code over GF(2) with n=504, k=12 and d=232.
This code was found by Heurico 1.16 in 0.335 seconds.