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

generates a code of length 62 over Z8 who´s minimum homogenous weight is 54.

Homogenous weight enumerator: w(x)=1x^0+143x^54+8x^55+331x^56+96x^57+403x^58+136x^59+457x^60+304x^61+525x^62+184x^63+435x^64+224x^65+345x^66+56x^67+196x^68+16x^69+118x^70+69x^72+28x^74+14x^76+6x^78+1x^92

The gray image is a code over GF(2) with n=248, k=12 and d=108.
This code was found by Heurico 1.16 in 1.04 seconds.