The generator matrix

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

generates a code of length 21 over Z8 who´s minimum homogenous weight is 15.

Homogenous weight enumerator: w(x)=1x^0+64x^15+293x^16+704x^17+1258x^18+1978x^19+2481x^20+2672x^21+2667x^22+2092x^23+1228x^24+568x^25+232x^26+106x^27+29x^28+8x^29+3x^30

The gray image is a code over GF(2) with n=84, k=14 and d=30.
This code was found by Heurico 1.16 in 1.75 seconds.