The generator matrix

 1  1  1  1  1  1  1  1  1  2  2  1  2  2 12  4  2  1
 0  2  0  0  0  2  6  2  0  4 14 14 10 14  8 12  0  0
 0  0  2  0  2  2  2  4  2  0 14  6 12  2  2  2  4  0
 0  0  0  2  2  0  2  6  4  2 10  2 10  8  8  8 12  0
 0  0  0  0  8  0  0  0  0  0  8  8  8  0  8  8  0  0
 0  0  0  0  0  8  8  0  8  8  8  0  0  0  8  0  0  0

generates a code of length 18 over Z16 who´s minimum homogenous weight is 12.

Homogenous weight enumerator: w(x)=1x^0+118x^12+296x^13+645x^14+1496x^15+3471x^16+5688x^17+9274x^18+5744x^19+3588x^20+1368x^21+694x^22+248x^23+116x^24+8x^25+10x^26+2x^28+1x^30

The gray image is a code over GF(2) with n=144, k=15 and d=48.
This code was found by Heurico 1.16 in 2.45 seconds.