The generator matrix

 1  1  1  1  1  1  1  1  1  1  X  0  1  1  X X^2+2  1  1  1  1  X  2  X X^2  X  X  X  X X^2  0  1
 0  X X^2+2 X^2+X  2 X^2+X+2 X^2 X+2  0 X^2+X X^2+X  X X^2+2 X+2 X+2  X  2 X^2 X^2+X+2  X X^2+X+2  X  X  X  0 X^2+2  2 X^2 X^2+2 X^2  0

generates a code of length 31 over Z4[X]/(X^3+2,2X) who´s minimum homogenous weight is 30.

Homogenous weight enumerator: w(x)=1x^0+36x^30+40x^31+39x^32+8x^33+4x^34

The gray image is a code over GF(2) with n=248, k=7 and d=120.
This code was found by Heurico 1.16 in 0.015 seconds.