The generator matrix

 1  0  0  0  1  1  1  2  1  1  1  1  0 14 14  1  2  8  1 14  1  1 12  1  4  1 10  8  1  1
 0  1  0  0  2  9  5  1 15 10  6 13  1  1  6  0  1 12 15  8 12  5  1  2  1 10  1  1 12  0
 0  0  1  0  3  1  6  3 12  5  0  5 13  2  1  6  8  6 13  1  4  9 13  9  2 12  5 10  0  0
 0  0  0  1  1  4  3  1 10 14  3  1 14  9 15 14  4  1  4 15  5  5  8  6  5 11  4 15  2  0
 0  0  0  0  4  0  0  0  0  0  8  8  8  4  4  4  4  4  4  8 12  4  4 12  0 12  8  4  4  0

generates a code of length 30 over Z16 who´s minimum homogenous weight is 23.

Homogenous weight enumerator: w(x)=1x^0+138x^23+832x^24+2876x^25+6436x^26+16098x^27+29890x^28+48024x^29+52768x^30+49114x^31+29807x^32+16284x^33+6340x^34+2398x^35+836x^36+208x^37+56x^38+28x^39+8x^40+2x^44

The gray image is a code over GF(2) with n=240, k=18 and d=92.
This code was found by Heurico 1.16 in 216 seconds.