The generator matrix

1 0 0 0 0 0 0 1 1 1 1 0 0 1 2 2 2 1 1 0 1 1 2 0 1 1 0 1 0 0 0 1 1 2 1 1 0 2 1 2 2 2 0 1 1 2 2 1 1 0 2 1 2 2 2 1 1 1 1 1 0 1 1
0 1 0 0 0 0 0 0 0 0 0 0 1 2 1 1 1 3 1 1 1 3 2 2 1 2 2 1 0 1 1 0 1 2 2 0 1 0 0 2 2 0 1 3 3 2 1 1 3 0 1 0 1 1 2 1 1 2 0 1 2 0 0
0 0 1 0 0 0 0 0 0 0 0 0 0 0 0 0 2 2 2 2 2 2 2 0 0 2 1 1 1 3 1 1 3 1 3 1 1 1 3 1 1 1 3 2 0 2 0 1 2 2 3 0 1 1 0 0 3 1 0 1 1 0 0
0 0 0 1 0 0 0 0 1 1 3 1 2 1 1 0 1 0 0 2 0 3 1 1 0 2 0 3 1 1 1 3 2 1 3 2 1 2 3 1 1 0 0 0 1 0 0 1 2 2 1 1 1 0 2 3 2 3 1 2 2 0 0
0 0 0 0 1 0 0 1 0 1 2 1 2 2 3 1 1 0 2 3 1 0 2 3 2 1 1 2 2 2 1 2 2 3 3 0 1 1 0 1 2 2 1 2 2 1 0 2 1 1 3 0 0 0 2 3 0 3 2 2 3 0 0
0 0 0 0 0 1 0 1 0 2 3 3 1 1 0 3 3 1 3 3 1 2 1 3 2 3 1 1 3 0 1 0 2 0 1 0 1 2 3 1 1 3 3 0 1 0 2 2 2 2 1 3 1 2 1 3 3 1 3 1 0 0 0
0 0 0 0 0 0 1 1 3 2 0 1 1 1 1 0 0 2 1 3 0 2 2 0 3 0 2 3 1 2 3 1 2 0 0 3 2 2 2 3 2 2 3 2 1 0 3 0 2 3 3 0 2 3 3 2 3 2 0 0 0 0 0
0 0 0 0 0 0 0 2 2 0 2 2 2 0 2 2 0 2 0 0 0 0 0 2 0 2 0 2 0 0 0 2 2 0 0 0 2 2 2 0 2 0 2 0 2 2 2 0 2 0 2 0 0 0 2 2 2 0 0 0 2 2 0

generates a code of length 63 over Z4 who´s minimum homogenous weight is 48.

Homogenous weight enumerator: w(x)=1x^0+67x^48+366x^50+867x^52+1518x^54+2269x^56+2990x^58+3760x^60+4410x^62+4436x^64+4048x^66+3270x^68+2214x^70+1335x^72+698x^74+316x^76+114x^78+52x^80+26x^82+11x^84

The gray image is a code over GF(2) with n=126, k=15 and d=48.
This code was found by Heurico 1.10 in 101 seconds.