The generator matrix

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

generates a code of length 26 over Z8 who´s minimum homogenous weight is 20.

Homogenous weight enumerator: w(x)=1x^0+125x^20+104x^21+572x^22+560x^23+1144x^24+824x^25+1448x^26+992x^27+1194x^28+472x^29+460x^30+112x^31+151x^32+8x^33+16x^34+9x^36

The gray image is a code over GF(2) with n=104, k=13 and d=40.
This code was found by Heurico 1.16 in 0.653 seconds.