The generator matrix

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

generates a code of length 48 over GR(16,4) who´s minimum homogenous weight is 128.

Homogenous weight enumerator: w(x)=1x^0+135x^128+108x^129+228x^130+696x^131+1179x^132+876x^133+888x^134+2244x^135+1983x^136+2160x^137+1320x^138+3636x^139+3561x^140+3084x^141+1884x^142+5040x^143+5082x^144+4092x^145+2244x^146+5232x^147+4344x^148+3636x^149+1920x^150+3636x^151+2508x^152+1224x^153+624x^154+996x^155+513x^156+180x^157+108x^158+24x^159+69x^160+39x^164+27x^168+12x^172+3x^176

The gray image is a code over GF(4) with n=192, k=8 and d=128.
This code was found by Heurico 1.16 in 13.3 seconds.