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Hi everybody,

I am wondering if anybody could comment on whether or not VASP has any problem or issue in handling a system (unit cell/super cell) that has negative lattice vector components and negative fractional coordinates of the constituent atoms in geometry optimisations, MD, and any post processing single point jobs. I have been hearing that VASP might have got a bit of issue, although nothing really definitive. So, any clarifying comments would be highly appreciated and of much help.

Thanks,
Sankh

no, there are no problems with negative lattice vectors or atoms positions