The generator matrix

 1  0  0  0  1  1  1  1  1  1  1  1 2a+2  1  1  1  1  2  1  1 2a+2  1  1  0  1  1  1  1  1  1  0  1  1  1 2a  1  1  1 2a+2  1  1  1  1  1  1  1  1  1  0  1  1  1  0  2  1 2a 2a  1  1  1  1  1  1  2  1  1 2a+2 2a  1  1  1  1 2a  1  1  1  1  1  2  2  1  1  2  1  1 2a+2  1  1
 0  1  0  0 2a+2  0 2a+2  1 3a+2 3a+3  2  0  2  2 2a+3 a+3  a  1 2a+3 3a+3  1  2 a+2  1  3  1 a+3 3a 2a+3  1  1 2a a+1 a+1  1 a+3  3 3a 2a 3a+2  a a+1 a+2 a+2 2a+1 2a+2 3a+3 a+3  1 a+1  a 2a+2  1  1 a+2  1  1  2 3a+1  3 a+1 a+2 3a+2  1 3a+2 a+3  1  1  a 3a+1 2a+3 3a+1  1  3 2a+1 a+1  a  3 2a  1 3a+1 a+3  1 3a a+1  1 a+3 2a+3
 0  0  1  0  2 2a+2  0 2a 2a 2a 2a+3 2a+3  1 3a+2 a+1  3 2a+3 3a+1 a+3 2a+1 2a+3 3a+3 3a+3 a+3 3a+1  3 2a 2a+1  3  0 2a+1 3a+3 3a+1 a+3 a+2 a+2  0 2a  1 3a+3 a+3  0 2a+2 a+3 2a+1 2a+1 a+1 3a a+1  1  1  a  a a+2 a+2 2a 2a+3  a 3a+2 a+2  3  2  a 2a+2 a+2 3a  2 2a+1  a 2a+3 3a 3a+1 3a+3 2a 3a 2a+3  3 2a+2  1  0 3a+3 3a+1  3 2a a+3 2a  2 3a+1
 0  0  0  1 2a+3 3a+2 3a+3 3a+1 a+1 a+3 3a+3  2 a+1 3a+2  2  a 3a 3a+2 3a+1 3a+3  a  1  3  1 a+2 3a+2 2a a+1 2a+3 2a+2  2 a+1  0  a  a 2a+2 2a+3  1 3a 3a  0 3a 3a 3a+3 2a  a 2a+3  1 a+1 2a 2a+1 2a+2 3a+1 2a+3 a+3 2a+2 2a+3  1 3a+3 3a a+3 2a+2 2a+3  3  0 a+2 3a 3a+1 a+2  0 2a+2 3a+1 a+1  a  0 2a+1 a+1 3a+1  0 a+1  0  a 2a a+2 a+3 a+1  3  1

generates a code of length 88 over GR(16,4) who´s minimum homogenous weight is 247.

Homogenous weight enumerator: w(x)=1x^0+456x^247+747x^248+288x^249+672x^250+1836x^251+1719x^252+852x^253+1656x^254+2736x^255+3147x^256+1164x^257+1824x^258+3648x^259+4023x^260+1272x^261+2100x^262+3912x^263+3417x^264+1428x^265+2040x^266+3648x^267+3852x^268+1008x^269+1812x^270+3300x^271+3201x^272+948x^273+1392x^274+2304x^275+1575x^276+456x^277+540x^278+984x^279+696x^280+204x^281+216x^282+180x^283+135x^284+60x^285+36x^286+36x^287+15x^288

The gray image is a code over GF(4) with n=352, k=8 and d=247.
This code was found by Heurico 1.16 in 28.3 seconds.