The generator matrix

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

generates a code of length 47 over Z4[X]/(X^2+2,2X) who´s minimum homogenous weight is 42.

Homogenous weight enumerator: w(x)=1x^0+398x^42+950x^44+846x^46+791x^48+578x^50+326x^52+154x^54+40x^56+8x^58+4x^60

The gray image is a code over GF(2) with n=188, k=12 and d=84.
This code was found by Heurico 1.11 in 10.6 seconds.