The generator matrix

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

generates a code of length 68 over Z8 who´s minimum homogenous weight is 62.

Homogenous weight enumerator: w(x)=1x^0+246x^62+124x^63+530x^64+256x^65+675x^66+196x^67+525x^68+160x^69+398x^70+116x^71+301x^72+80x^73+201x^74+76x^75+118x^76+16x^77+43x^78+27x^80+4x^82+1x^84+1x^86+1x^88

The gray image is a code over GF(2) with n=272, k=12 and d=124.
This code was found by Heurico 1.16 in 1.77 seconds.