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Dear Vaspers,
I am doing geometry optimization on an one dimensional polymer. The SCF failed to converge at the ninth cycle with the following error message:

ERROR FEXCP: supplied Exchange-correletion table
is too small, maximal index : 4355

Could you help to figure out whats wrong?

Thank you in advance.

Tian

probably your geometry input leads to an unreasonable charge density. please check the interatomic spacings as written in OUTCAR.

some times it because your initial structure is far away from your wanted structre ,so it appear this problem just as admin saild