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Hello,

I was trying to run a very simple calculation of one metal atom in a box for all alkali metals.
I was using the PBE fuctional in Vasp 5.3.
My calculations converge well for all atoms but the Cs-atom. Everytime I run this calculation, I receive the same error: Error EDDDAV: Call to ZHEGV failed. Returncode = 7 1 8
(I was trying to change ENCUT, ISPIN, etc....) Apparently this means there is an error in the Davidson, which is strange. (I also changed the electronic algorithm at one point without success...)

However, when I used the Cs LDA pseudopotential, the calculation converged and yielded reasonable values.

Is it possible that there is a bug in the pseudopotential?

Thanks a lot!!!

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