The generator matrix

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

generates a code of length 67 over GR(16,4) who´s minimum homogenous weight is 193.

Homogenous weight enumerator: w(x)=1x^0+144x^193+168x^194+792x^195+90x^196+192x^197+288x^198+792x^199+78x^200+144x^201+108x^202+144x^203+30x^204+144x^205+12x^206+24x^208+96x^209+156x^210+504x^211+18x^212+48x^213+36x^214+72x^215+6x^216+6x^220+3x^224

The gray image is a code over GF(4) with n=268, k=6 and d=193.
This code was found by Heurico 1.16 in 90.7 seconds.