The generator matrix

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

generates a code of length 24 over Z4[X]/(X^3+2,2X) who´s minimum homogenous weight is 20.

Homogenous weight enumerator: w(x)=1x^0+166x^20+64x^22+1599x^24+64x^26+138x^28+15x^32+1x^40

The gray image is a code over GF(2) with n=192, k=11 and d=80.
This code was found by Heurico 1.16 in 1.48 seconds.