[Re: regarding timesteps]

   for Larger systems it permit larger fluctuations. it's OK. i am
generating separately for 2744 particle during this i am facing error
lost atoms. i kept all thing same only change in number of particle or
length of box. so what parameter i will set for removing this error.
should i change time step or tdamp or padamp

I don't have a crystal ball. How should u know?y likely the error is elsewhere.

as i told you on the other thread (hope i'm not mistaken!) you should
visualize the system and check how are the atoms placed. are you
creating the particles in random positions?