The generator matrix

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

generates a code of length 30 over Z8 who´s minimum homogenous weight is 21.

Homogenous weight enumerator: w(x)=1x^0+52x^21+396x^22+972x^23+2117x^24+3884x^25+6794x^26+10132x^27+14079x^28+17618x^29+18619x^30+17696x^31+14365x^32+10574x^33+6739x^34+3636x^35+1981x^36+826x^37+405x^38+140x^39+32x^40+6x^41+7x^42+1x^48

The gray image is a code over GF(2) with n=120, k=17 and d=42.
This code was found by Heurico 1.11 in 71.1 seconds.