The generator matrix

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

generates a code of length 12 over Z4[X]/(X^2+2,2X) who´s minimum homogenous weight is 9.

Homogenous weight enumerator: w(x)=1x^0+60x^9+174x^10+128x^11+304x^12+144x^13+144x^14+48x^15+15x^16+4x^17+2x^18

The gray image is a code over GF(2) with n=48, k=10 and d=18.
This code was found by Heurico 1.16 in 0.00488 seconds.