The generator matrix

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

generates a code of length 7 over Z4[X]/(X^2+2) who´s minimum homogenous weight is 4.

Homogenous weight enumerator: w(x)=1x^0+24x^4+90x^5+72x^6+654x^7+69x^8+86x^9+24x^10+2x^11+2x^12

The gray image is a code over GF(2) with n=56, k=10 and d=16.
This code was found by Heurico 1.16 in 6.87e-008 seconds.