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Dear All,

By browsing the posts I found tags NOT described in the manual,
such as EFIELD, ICORELEVEL.
Can someone tell me where to find these hidden tags?
Are there any tags for constraint relaxation, say leaving a cell length unchanged?

Many thanks.

Maybe you can have a look at vasprun.xml, which is an output of vasp run.

There is no tag for constraint relaxation, but you can achieve this by modifying constr_cell_relax.F

Thanks a lot, konglt.