"lost atom" error with fix nve/npt command

LAMMPS LAMMPS Beginners
1

Why does the ‘fix nve/npt’ command result in a ‘lost atom’ error when using periodic boundary conditions in the x, y, and z directions?

2

there is no such command in LAMMPS

3

I mean fix 1 all nve or fix 1 all npt

4

It is not the command that causes the error but either your geometry or your force field. Please see the (many) existing discussions in the forum archive.

5

Then please write what you mean. In the real of science it is always a benefit of being precise and detailed.