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When I do the md simulation ,I face a problem .The problem is the freedom of the system , I don't know how to set the NFREE ,the default is NFREE=3Nion-3,but there is always a waring that tell me the the number of the freedom is too large .It seems that the NFREE can be reduced when we obey some rules .
So ,what I should set this parameter according different system ?

Thanks ! Waiting for the reply.

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