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Dear all,
what is the differnce between NSW=1 and NSW=0 claculations.
Both seem to be giving the same results ..

thanx in advance,
rajesh

there is no difference, for both inputs, one ionic step is performed and the positions are updated at the end of the step (if IBRION is set accordingly).
If the ions positions must not be updated, NSW= -1 has to be chosen.