The generator matrix

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

generates a code of length 9 over Z4[X]/(X^2+2) who´s minimum homogenous weight is 6.

Homogenous weight enumerator: w(x)=1x^0+60x^6+144x^7+1094x^8+1504x^9+1088x^10+144x^11+56x^12+4x^14+1x^16

The gray image is a code over GF(2) with n=72, k=12 and d=24.
This code was found by Heurico 1.16 in 0.015 seconds.