The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+351x^20+264x^21+766x^22+224x^23+901x^24+336x^25+692x^26+160x^27+305x^28+40x^29+46x^30+10x^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 62.3 seconds.