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<p>Probably you started with a wrong cell. To say more we need more
detail.<br>
</p>
<p>kind regards<br>
</p>
<div class="moz-cite-prefix">On 2020-11-22 12:30, HUSSAM BOUAAMLAT
wrote:<br>
</div>
<blockquote type="cite"
cite="mid:CACyXKrecbQxyYe+QVPaWwhRAR3ootDeexmgw9X6xQeuEfGOF0Q@mail.gmail.com">
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<div dir="ltr">Dear QE users,
<div><br>
</div>
<div> I am studying a 6 by 6 unit cell of an ion intercalated in
between bilayer graphene, I am doing a vc-relax of the cell
and it gave me an error :<br>
</div>
<div><br>
</div>
<div>Error in routine scale_h (1):<br>
Not enough space allocated for radial FFT: try restarting
with a larger cell_factor.<br>
</div>
<div><br>
</div>
<div>I increased the cell_factor to 3 but it didn't converge if
you could give me advice on how to solve this problem I would
really appreciate it. Thank you.</div>
<div><br>
</div>
<div>Best regards,</div>
</div>
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