The generator matrix

 1  0  0  0  0  1  1  1  2  1  1  1  1  1  2  1  1  0  0  2  0  1  2  1
 0  1  0  0  0  0  0  0  0  2  3  3  2  1  1  2  3  1  1  2  1  0  1  0
 0  0  1  0  0  2  1  3  1  0  1  2  0  1  0  2  2  1  3  1  2  2  1  0
 0  0  0  1  0  3  1  2  3  0  0  0  2  1  3  2  3  3  0  3  1  2  0  1
 0  0  0  0  1  1  2  3  3  1  3  0  3  3  3  1  3  3  3  1  2  0  2  1

generates a code of length 24 over Z4 who´s minimum homogenous weight is 18.

Homogenous weight enumerator: w(x)=1x^0+25x^18+72x^19+79x^20+88x^21+118x^22+104x^23+93x^24+84x^25+84x^26+104x^27+75x^28+48x^29+26x^30+8x^31+6x^32+4x^33+3x^34+2x^36

The gray image is a code over GF(2) with n=48, k=10 and d=18.
This code was found by Heurico 1.16 in 0.0343 seconds.