The generator matrix

 1  1  1  1  1  1  1  1  2  2  2  2  2  2  2  1  1  1
 0  2  0  0  0  2  6  2  0  0  4  2  6  2  6  0  0  0
 0  0  2  0  2  2  6  0  0  2  2  2  6  4  0  0  0  0
 0  0  0  2  2  0  6  2  2  2  0  0  6  2  0  0  0  0
 0  0  0  0  4  0  0  0  0  0  0  0  4  4  4  0  0  0
 0  0  0  0  0  4  0  0  0  0  4  0  0  4  4  0  0  0
 0  0  0  0  0  0  4  0  0  0  4  4  4  4  4  0  0  0
 0  0  0  0  0  0  0  4  0  0  4  4  0  0  4  0  0  0
 0  0  0  0  0  0  0  0  4  0  4  0  4  0  4  0  0  0
 0  0  0  0  0  0  0  0  0  4  4  4  4  0  0  0  0  0

generates a code of length 18 over Z8 who´s minimum homogenous weight is 8.

Homogenous weight enumerator: w(x)=1x^0+109x^8+480x^10+48x^11+648x^12+560x^13+2524x^14+1008x^15+4347x^16+2800x^17+8208x^18+1680x^19+4872x^20+1680x^21+1768x^22+336x^23+1207x^24+80x^25+304x^26+80x^28+28x^30

The gray image is a code over GF(2) with n=72, k=15 and d=16.
This code was found by Heurico 1.16 in 1.86 seconds.