The generator matrix

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

generates a code of length 30 over Z4[X]/(X^2+2) who´s minimum homogenous weight is 29.

Homogenous weight enumerator: w(x)=1x^0+24x^29+204x^30+24x^31+1x^32+2x^44

The gray image is a code over GF(2) with n=240, k=8 and d=116.
This code was found by Heurico 1.16 in 0.016 seconds.