The generator matrix

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

generates a code of length 90 over GR(16,4) who´s minimum homogenous weight is 254.

Homogenous weight enumerator: w(x)=1x^0+1152x^254+1140x^255+228x^256+3324x^258+2604x^259+579x^260+4800x^262+3768x^263+612x^264+6252x^266+3936x^267+684x^268+6336x^270+4056x^271+555x^272+5892x^274+3816x^275+636x^276+4548x^278+2844x^279+537x^280+3072x^282+1704x^283+204x^284+1236x^286+468x^287+48x^288+228x^290+228x^291+9x^292+24x^294+12x^295+3x^296

The gray image is a code over GF(4) with n=360, k=8 and d=254.
This code was found by Heurico 1.16 in 77.6 seconds.