Hi

I have been trying to make a HMMM bilayer through CHARMM-GUI but since the protein of interest is a well spread one, with certain domains being intrinsically disordered, I had to make a box 20 nm X 20 nm in XY plane (which is also the plane in which the bilayer exists) and 10 nm height. However, the online server is hanging up after step 4 every time. I assume it is because of the size of output files. I want to try making the same entirely through gromacs. Can someone tell me how to do that?