The generator matrix

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

generates a code of length 49 over Z4[X]/(X^2+2) who´s minimum homogenous weight is 48.

Homogenous weight enumerator: w(x)=1x^0+15x^48+222x^49+15x^50+2x^65+1x^66

The gray image is a code over GF(2) with n=392, k=8 and d=192.
This code was found by Heurico 1.16 in 0.062 seconds.