The generator matrix

 1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1  2  2  2  2  2  2  2  2  2  2  2  2  2  2  2
 0 12  0  4  0  0  4 12  8  8 12  4  8  8 12  4  8  0 12  4  4  4 12 12  8 12  0  0  0  8  8
 0  0 12  4  8  4 12  8  8  4 12  8  0 12  4  0  4 12  0  8  4 12 12  4 12  8  4  0  8  8  0

generates a code of length 31 over Z16 who´s minimum homogenous weight is 30.

Homogenous weight enumerator: w(x)=1x^0+30x^30+192x^31+31x^32+2x^46

The gray image is a code over GF(2) with n=248, k=8 and d=120.
This code was found by Heurico 1.16 in 0.0104 seconds.