The generator matrix

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

generates a code of length 63 over Z8 who´s minimum homogenous weight is 57.

Homogenous weight enumerator: w(x)=1x^0+198x^57+242x^58+370x^59+476x^60+316x^61+428x^62+378x^63+303x^64+334x^65+294x^66+212x^67+145x^68+144x^69+120x^70+52x^71+31x^72+26x^73+4x^74+10x^75+3x^76+4x^77+2x^79+1x^80+2x^81

The gray image is a code over GF(2) with n=252, k=12 and d=114.
This code was found by Heurico 1.16 in 1.13 seconds.