The generator matrix

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

generates a code of length 50 over Z2[X]/(X^4) who´s minimum homogenous weight is 46.

Homogenous weight enumerator: w(x)=1x^0+355x^46+192x^47+707x^48+336x^49+1028x^50+304x^51+635x^52+176x^53+272x^54+16x^55+63x^56+9x^62+1x^68+1x^72

The gray image is a linear code over GF(2) with n=400, k=12 and d=184.
This code was found by Heurico 1.16 in 138 seconds.