The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+184x^23+500x^24+1042x^25+1680x^26+2582x^27+3636x^28+4276x^29+4738x^30+4482x^31+3771x^32+2724x^33+1550x^34+922x^35+404x^36+148x^37+94x^38+22x^39+8x^40+2x^41+2x^42

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 11.7 seconds.