[lammps-users] about 'segmentation fault'

I have been using lammps2001 for a few months.
Recently when I enlarge my system and perform an energy minimization of the atomic coordinates of the system ,I meet an error that is ‘segmentation fault’.The new system has more than 40000 particles and does not include the computation of coulombic interaction. but when i run the small system,the error does not appear.
Any comments/suggestions are highly appreciated.
Thanks in advance!

中 国 每 年 用 掉 多 少 双 一 次 性 筷 子 ?
450亿双。这会耗费170万立方米的木材,需要砍伐大约2500万棵大树! <网易邮箱公益宣传>