The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+127x^18+546x^19+1362x^20+3150x^21+6050x^22+9794x^23+14853x^24+19090x^25+20701x^26+19444x^27+14953x^28+10118x^29+6055x^30+2812x^31+1262x^32+534x^33+152x^34+42x^35+17x^36+4x^37+3x^38+2x^39

The gray image is a code over GF(2) with n=104, k=17 and d=36.
This code was found by Heurico 1.11 in 57.4 seconds.