The generator matrix

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

generates a code of length 74 over GR(16,4) who´s minimum homogenous weight is 207.

Homogenous weight enumerator: w(x)=1x^0+96x^207+360x^208+168x^210+528x^211+810x^212+432x^214+972x^215+1314x^216+504x^218+1068x^219+1140x^220+672x^222+1320x^223+1272x^224+792x^226+1080x^227+1212x^228+432x^230+876x^231+735x^232+72x^234+204x^235+171x^236+69x^240+3x^244+24x^248+9x^252+27x^256+15x^260+3x^264+3x^272

The gray image is a code over GF(4) with n=296, k=7 and d=207.
This code was found by Heurico 1.16 in 31.8 seconds.