The generator matrix

 1  0  0  0  0  1  1  1  1  2  4  0  6  2  4  1  1  1  1  0  1  1  1  1  1  1  1  0  1  1
 0  1  0  0  0  4  4  0  4  4  1  1  1  1  1  2  1  6  7  1  2  1  7  6  6  1  7  1  2  4
 0  0  1  0  0  4  0  5  3  1  0  2  7  2  5  3  0  7  4  7  4  6  7  6  1  2  7  6  5  4
 0  0  0  1  0  1  2  2  3  5  3  3  1  6  6  1  7  4  0  4  3  5  1  6  3  4  4  0  3  4
 0  0  0  0  1  1  3  5  2  3  6  1  3  5  0  7  4  0  3  5  4  5  5  2  7  4  3  7  5  6

generates a code of length 30 over Z8 who´s minimum homogenous weight is 23.

Homogenous weight enumerator: w(x)=1x^0+120x^23+543x^24+1010x^25+1882x^26+2538x^27+3704x^28+3954x^29+4916x^30+4112x^31+4185x^32+2582x^33+1712x^34+884x^35+384x^36+134x^37+60x^38+24x^39+15x^40+6x^42+2x^43

The gray image is a code over GF(2) with n=120, k=15 and d=46.
This code was found by Heurico 1.16 in 11.5 seconds.