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Hi
I've read in the VASP's manual that an option EDIFFG is responsible for the ions relaxation tolerance. It has a meaning of energy tolerance If it's positive and force tolerance in the case of negative values.

Is it somehow possible to set both tolerances?

Krzysztof

the values to choose depend on the problem you want to solve:
--) EDIFFG 0
this depends of the required accuracy of the total energy you need for your investigation, which may vary over several ranges of magnitude: the possible error in energy due to relaxation convergence should be at least one order of magnitude smaller than the requested accuracy of the effect you are investigating: eg, if you need to determine some adsorption energy to an accuracy of meV, EDIFFG should be 1e-4 or 1e-5 at least. (and, correspondingly EDIFF 1e-05 or 1e-06)

Thank you for response but it is not what I meant. I mean about setting both tolerances in the same time. For example calculation are stopped when energy difference is less than 1e-05 eV >>AND<< maximal force is less than 0.01 eV/A.

Thank you in advance:
Krzysztof

this is not possible. Only the first entry for each tag in INCAR is taken for input from INCAR, multiple settings are ignored