The generator matrix

 1  0  1  0  1  0  1  0  1  X  1  X  1  1  X  X
 0  1  0  1  0  1  0  1  X  1  X  1  X  X  1  1
 0  0  X  0  0  X  X  X  X  X  X  0  0  0  X  0
 0  0  0  X  X  X  X  0  0  0  X  X  X  0  X  0

generates a code of length 16 over Z2[X]/(X^2) who´s minimum homogenous weight is 16.

Homogenous weight enumerator: w(x)=1x^0+62x^16+1x^32

The gray image is a linear code over GF(2) with n=32, k=6 and d=16.
As d=16 is an upper bound for linear (32,6,2)-codes, this code is optimal over Z2[X]/(X^2) for dimension 6.
This code was found by Heurico 1.16 in 0.0444 seconds.