The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  X  1  1  X  1  1  1  X  1  X  1  X  X  2  0  1  X  X  X  2  0  2  1  X  X  2  2  0  X  1  2  1
 0  2  0  2  0  2  0  2  0  2  0  2  0  2  0  2  2  0  2  2  0  2  0  2  2  0  0  0  2  2  2  2  0  2  0  2  2  0  0  0  2  0  2  2  0  2  0  0

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

Homogenous weight enumerator: w(x)=1x^0+1x^50+12x^51+1x^52+1x^54

The gray image is a code over GF(2) with n=192, k=4 and d=100.
This code was found by Heurico 1.16 in 0.035 seconds.