The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  X  0  X  2  X  0  1  X  2  1  X  1  X  1  1  1  1  1  X 2X  X 2X+2  X 2X  X 2X+2  1  1  1  1 2X+2  0  0  1
 0  X  2 3X+2  0 3X+2  2 3X 2X X+2 2X+2 3X 2X X+2 2X+2  X 3X+2  X 3X  X 3X+2  X  0 3X  X  2  0 2X  2  2 3X+2 X+2 3X 3X X+2  X  X  X X+2  X  X  X  0 2X 2X+2 2X+2  2  X  X  0
 0  0 2X 2X 2X  0  0 2X 2X 2X  0  0  0  0 2X 2X  0 2X 2X  0 2X  0  0  0 2X 2X 2X 2X 2X  0  0 2X  0 2X 2X 2X  0  0  0  0 2X 2X 2X  0 2X  0 2X  0 2X  0

generates a code of length 50 over Z4[X]/(X^2+2X+2) who´s minimum homogenous weight is 48.

Homogenous weight enumerator: w(x)=1x^0+14x^48+94x^49+60x^50+52x^51+16x^52+14x^53+2x^54+1x^58+1x^60+1x^70

The gray image is a code over GF(2) with n=400, k=8 and d=192.
This code was found by Heurico 1.16 in 0.094 seconds.