The generator matrix

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

generates a code of length 64 over Z8 who´s minimum homogenous weight is 45.

Homogenous weight enumerator: w(x)=1x^0+32x^45+94x^46+142x^47+303x^48+384x^49+551x^50+628x^51+724x^52+802x^53+970x^54+1118x^55+1345x^56+1634x^57+1959x^58+2436x^59+3236x^60+3724x^61+4702x^62+5088x^63+5767x^64+4668x^65+5063x^66+4076x^67+3273x^68+2436x^69+1850x^70+1392x^71+1208x^72+1144x^73+1016x^74+856x^75+865x^76+602x^77+548x^78+352x^79+215x^80+172x^81+70x^82+40x^83+22x^84+16x^85+8x^86+2x^89+1x^90+1x^96

The gray image is a code over GF(2) with n=256, k=16 and d=90.
This code was found by Heurico 1.16 in 98.9 seconds.