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Hello,

I'm a new VASP user, and I trying to perform a cNEB calculation for NO formation on Pt(111) surface.

After finishing the regular NEB (converged) calculation. I have been trying to run a cNEB without success for the different systems. I have tried using the force-based optimizers with IBRION=3, and also with IBRION=3, POTIM=0, IOPT=3 (MAXMOVE=0.2, TIMESTEP=0.1) both of them with EDIFFG=-0.05 but the forces are still far away of the convergence criteria.

Any advice that could help me.

Thanks for your help.

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