The generator matrix

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

generates a code of length 57 over Z8 who´s minimum homogenous weight is 48.

Homogenous weight enumerator: w(x)=1x^0+63x^48+50x^49+113x^50+124x^51+166x^52+238x^53+307x^54+412x^55+412x^56+468x^57+380x^58+364x^59+275x^60+212x^61+162x^62+100x^63+72x^64+42x^65+47x^66+24x^67+30x^68+14x^69+10x^70+4x^72+4x^74+1x^76+1x^86

The gray image is a code over GF(2) with n=228, k=12 and d=96.
This code was found by Heurico 1.16 in 0.925 seconds.