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

generates a code of length 69 over GR(16,4) who´s minimum homogenous weight is 192.

Homogenous weight enumerator: w(x)=1x^0+273x^192+84x^194+288x^195+831x^196+348x^198+900x^199+972x^200+492x^202+1092x^203+1146x^204+648x^206+1320x^207+1383x^208+924x^210+1512x^211+1146x^212+444x^214+852x^215+930x^216+132x^218+180x^219+279x^220+102x^224+36x^228+24x^232+15x^236+21x^240+3x^244+6x^248

The gray image is a code over GF(4) with n=276, k=7 and d=192.
This code was found by Heurico 1.16 in 1.6 seconds.