The generator matrix

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

generates a code of length 48 over Z4[X]/(X^2+2,2X) who´s minimum homogenous weight is 42.

Homogenous weight enumerator: w(x)=1x^0+65x^42+286x^43+317x^44+442x^45+343x^46+514x^47+359x^48+424x^49+394x^50+354x^51+192x^52+156x^53+86x^54+86x^55+24x^56+32x^57+5x^58+8x^59+3x^60+2x^61+3x^62

The gray image is a code over GF(2) with n=192, k=12 and d=84.
This code was found by Heurico 1.16 in 0.52 seconds.