The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+392x^20+988x^21+1646x^22+2492x^23+3589x^24+4576x^25+4934x^26+4932x^27+3961x^28+2604x^29+1542x^30+660x^31+270x^32+120x^33+34x^34+12x^35+11x^36+4x^38

The gray image is a code over GF(2) with n=104, k=15 and d=40.
This code was found by Heurico 1.16 in 10.3 seconds.