The generator matrix

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

generates a code of length 67 over GR(16,4) who´s minimum homogenous weight is 194.

Homogenous weight enumerator: w(x)=1x^0+600x^194+456x^195+108x^196+672x^198+504x^199+66x^200+396x^202+228x^203+204x^206+156x^207+39x^208+252x^210+108x^211+36x^212+132x^214+60x^215+3x^216+48x^218+24x^219+3x^232

The gray image is a code over GF(4) with n=268, k=6 and d=194.
This code was found by Heurico 1.16 in 0.532 seconds.