The generator matrix
1 1 1 1 1 1 X X X X X X
0 2 0 2 0 2 2 0 2 0 2 0
generates a code of length 12 over Z4[X]/(X^2+2,2X) who´s minimum homogenous weight is 12.
Homogenous weight enumerator: w(x)=1x^0+13x^12+2x^18
The gray image is a code over GF(2) with n=48, k=4 and d=24.
This code was found by Heurico 1.16 in 0.00032 seconds.