The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+76x^23+553x^24+1242x^25+2651x^26+4450x^27+7010x^28+10686x^29+11506x^30+11324x^31+7684x^32+4238x^33+2345x^34+1074x^35+424x^36+170x^37+72x^38+20x^39+8x^40+2x^42

The gray image is a code over GF(2) with n=240, k=16 and d=92.
This code was found by Heurico 1.16 in 23.9 seconds.