The generator matrix

 1  0  0  1  1  1  1  1  1  1  1  1  1  1  1  1  1  1 2a+2 2a  2  1  1  1  1 2a  1  1  1  1  1  1  1  1  1  1  1  1
 0  1  0 2a+2 2a  2  1 3a+2 3a+3 2a+3 2a+1 a+2  a a+1 a+3  3 3a 3a+1  1  1  1  0  1  a 3a+3  1 2a  2 a+3 3a+1 a+3  2 2a+1  0 3a+1 2a+3  3  1
 0  0  1  1  a 3a+3 3a+1 a+1 a+3 a+2 2a+1 3a+2 2a+2 2a+3 2a  2  3 3a 2a+1 3a a+1  2 3a+3  0 3a+1 3a+2 3a+2 a+3 2a+2 2a 3a+1  0 3a+3 3a 3a+2 2a+1 3a a+2

generates a code of length 38 over GR(16,4) who´s minimum homogenous weight is 108.

Homogenous weight enumerator: w(x)=1x^0+1008x^108+1368x^112+696x^116+696x^120+312x^124+15x^128

The gray image is a code over GF(4) with n=152, k=6 and d=108.
This code was found by Heurico 1.16 in 0.172 seconds.