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  2  1  2  1  1  1  1  1  1  1  2  1  1  2  1  2  1  1  1  1  1  1  1  1  1
 0  2  0  0  0  0  0  0  0  0  2  2  0  0  0  2  0  0  0  0  2  2  2  2  0  2  2  0  2  2  2  2  2  2  0  2  2  0  2  2  2  2  2  2  2  0  0  0  0  0  0  0  0  2  0  0  0
 0  0  2  0  0  0  0  0  0  2  2  2  0  2  2  0  0  0  2  2  2  2  2  2  0  2  0  2  0  0  0  2  0  2  2  0  2  0  2  2  2  0  2  0  0  2  0  2  0  0  2  0  0  0  2  0  0
 0  0  0  2  0  0  0  0  0  2  0  2  2  2  0  2  0  2  2  0  0  0  0  0  2  0  2  0  2  2  2  2  2  2  0  0  2  2  0  0  0  0  2  0  2  0  2  2  2  0  0  0  2  2  2  0  0
 0  0  0  0  2  0  0  0  2  0  0  2  2  0  2  2  0  0  2  2  0  0  0  2  2  2  2  0  2  0  2  0  0  2  2  0  0  0  0  2  0  2  2  0  2  0  0  0  2  2  0  2  0  0  2  0  0
 0  0  0  0  0  2  0  0  2  0  2  0  0  2  2  2  0  2  2  0  0  0  0  2  2  0  0  2  0  0  0  2  2  2  0  2  2  2  2  0  2  0  2  2  2  2  0  2  0  2  0  2  0  0  0  0  0
 0  0  0  0  0  0  2  0  2  2  2  0  0  0  2  2  2  0  0  2  0  0  2  0  2  0  2  0  0  2  2  0  2  0  0  0  0  2  0  2  2  2  2  2  0  0  0  2  2  0  2  2  2  2  0  0  0
 0  0  0  0  0  0  0  2  2  2  0  0  2  2  2  0  2  0  2  0  0  2  2  0  0  0  2  2  0  2  0  0  0  2  2  0  2  2  0  0  2  2  2  2  0  2  2  2  0  2  0  0  2  0  0  0  0

generates a code of length 57 over Z4 who´s minimum homogenous weight is 48.

Homogenous weight enumerator: w(x)=1x^0+31x^48+75x^52+48x^54+143x^56+64x^58+66x^60+16x^62+36x^64+27x^68+4x^72+1x^104

The gray image is a code over GF(2) with n=114, k=9 and d=48.
This code was found by Heurico 1.16 in 0.0765 seconds.