The generator matrix

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

generates a code of length 17 over Z8 who´s minimum homogenous weight is 12.

Homogenous weight enumerator: w(x)=1x^0+216x^12+32x^13+476x^14+256x^15+825x^16+448x^17+856x^18+256x^19+532x^20+32x^21+140x^22+22x^24+4x^28

The gray image is a code over GF(2) with n=68, k=12 and d=24.
This code was found by Heurico 1.16 in 8.04 seconds.