The generator matrix

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

generates a code of length 18 over Z8 who´s minimum homogenous weight is 12.

Homogenous weight enumerator: w(x)=1x^0+243x^12+950x^13+2079x^14+4420x^15+7783x^16+10818x^17+12599x^18+11352x^19+7719x^20+4378x^21+2085x^22+804x^23+251x^24+46x^25+5x^26+2x^28+1x^32

The gray image is a code over GF(2) with n=72, k=16 and d=24.
This code was found by Heurico 1.16 in 16.6 seconds.