The generator matrix

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

generates a code of length 59 over Z4 who´s minimum homogenous weight is 50.

Homogenous weight enumerator: w(x)=1x^0+212x^50+413x^52+444x^54+510x^56+528x^58+557x^60+456x^62+356x^64+278x^66+198x^68+88x^70+45x^72+10x^74

The gray image is a code over GF(2) with n=118, k=12 and d=50.
This code was found by Heurico 1.16 in 2.6 seconds.