The generator matrix

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

generates a code of length 26 over Z8 who´s minimum homogenous weight is 18.

Homogenous weight enumerator: w(x)=1x^0+192x^18+92x^19+1044x^20+988x^21+3508x^22+3680x^23+9228x^24+7492x^25+12910x^26+7536x^27+9390x^28+3812x^29+3566x^30+848x^31+905x^32+124x^33+170x^34+4x^35+38x^36+6x^38+2x^40

The gray image is a code over GF(2) with n=104, k=16 and d=36.
This code was found by Heurico 1.16 in 34.6 seconds.