The generator matrix

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

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

Homogenous weight enumerator: w(x)=1x^0+224x^12+256x^14+1102x^16+1024x^17+896x^18+448x^20+128x^22+16x^24+1x^32

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 4.59 seconds.