The generator matrix

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

generates a code of length 24 over Z8 who´s minimum homogenous weight is 20.

Homogenous weight enumerator: w(x)=1x^0+476x^20+932x^22+1316x^24+936x^26+364x^28+52x^30+19x^32

The gray image is a code over GF(2) with n=96, k=12 and d=40.
This code was found by Heurico 1.16 in 37.2 seconds.