[gmx-users] gmx density -d Z in a system with pbc = xy

[Alex]

I have pbc only in X-Y directions in my simulations (pbc = xy), and I want
to calculate the number density in Z direction using the "gmx density -f
*.xtc -s *.tpr -d Z -dens number" but the gmx density just stuck in the
beginning. I wonder how I can density in Z direction in such situations?
Thank you.

Best regards,
Alex