The generator matrix

 1  0  1  1  1  1  1
 0  1  1 2X+2 X+2  2  0
 0  0  X X+2 2X 2X+2  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+51x^4+76x^5+334x^6+1128x^7+329x^8+76x^9+50x^10+3x^12

The gray image is a code over GF(2) with n=56, k=11 and d=16.
This code was found by Heurico 1.16 in 0 seconds.