The generator matrix

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

generates a code of length 21 over Z8 who´s minimum homogenous weight is 17.

Homogenous weight enumerator: w(x)=1x^0+84x^17+221x^18+266x^19+305x^20+342x^21+284x^22+252x^23+191x^24+64x^25+13x^26+10x^27+7x^28+6x^29+2x^30

The gray image is a code over GF(2) with n=84, k=11 and d=34.
This code was found by Heurico 1.16 in 0.0494 seconds.