The generator matrix

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

generates a code of length 50 over Z4[X]/(X^3+2,2X) who´s minimum homogenous weight is 46.

Homogenous weight enumerator: w(x)=1x^0+148x^46+444x^47+774x^48+484x^49+579x^50+392x^51+700x^52+332x^53+135x^54+52x^55+12x^56+24x^57+16x^58+1x^62+1x^66+1x^72

The gray image is a code over GF(2) with n=400, k=12 and d=184.
This code was found by Heurico 1.16 in 0.235 seconds.