Dear Lammps users,
I am trying to run a large time scale(microseconds) MD simulation. The elements are Nickel and Titanium.
Since I have to go through a huge amount of time(microseconds) with a small timestep value(0.01ps), N value in run command became large( N=750000000000).
However, I found that when N became large, the simulation outputs an error as following;
ERROR: Invalid run command N value (run.cpp:108)
I experience an error when N is larger than 2000000000. But when N is less then the number, the simulation runs well.
Are there any high limit of N value in run command?
I am attaching my code for reference.
Temp change 1
velocity all create 300 4928459 dist gaussian
fix 1 all npt temp 300.0 480.6532 4.00 x 0 0 6 y 0 0 6 z 0 0 6 drag 0.2
variable press1 equal -(c_p+c_p+c_p)/(3*vol)
variable sigmazz equal c_p/(20*vol)
variable shearall equal -(c_p+c_p+c_p)/(3*vol)
thermo_style custom step temp cella cellb cellc cellalpha cellbeta cellgamma vol press v_press1 v_shearall v_sigmazz atoms pe etotal pxx pyy pzz pxy pxz pyz