Error runing EPW

Post here questions linked with issue while running the EPW code

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pravin_karna
Posts: 2
Joined: Wed Dec 21, 2022 4:50 pm
Affiliation: University of Rhode Island

Error runing EPW

Post by pravin_karna »

Hello,

I was trying to run EPW calculation for NiTi. However, while running the calculation I got an error stating

error opening ./save/NiTi.dvscf_paw_q1.

The dvscf file name in the SAVE folder is "NiTi.dvscf_q1"

So I dont know why it is trying to read another file.
I have used the same ecut in the SCF calculations prior and post the phonon calculation.
I am using PAW pseudopotentail with LDA approximation.

Thanks
Pravin Karna
gkafle1
Posts: 31
Joined: Wed Jun 17, 2020 8:55 pm
Affiliation: Binghamton University

Re: Error runing EPW

Post by gkafle1 »

Hi pravin_karna,

The reason is that you need to have both NiTi.dvscf_paw_qXX and NiTi.dvscf_qXX files in your save directory. When you run the phonon calculations, you can see NiTi.dvscf_paw_qXX and NiTi.dvscf_qXX files in your _ph0 directory. Please collect NiTi.dvscf_paw_qXX files also from the _ph0 directory and keep them in the save directory. This way your problem will be resolved. One thing to mention, the EPW calculations with PAW potentials are not well-tested.

Thanks!

Best
Gyanu Kafle
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