The generator matrix

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

generates a code of length 56 over Z4[X]/(X^3+2,2X) who´s minimum homogenous weight is 56.

Homogenous weight enumerator: w(x)=1x^0+49x^56+6x^58+2x^60+6x^62

The gray image is a code over GF(2) with n=448, k=6 and d=224.
This code was found by Heurico 1.16 in 0.094 seconds.