Dear QE developers and experts

I am trying to do third order force constant calculation in a 3x3x3 supercell.  
I have 190 input  files and I am continuing the scf runs for each. I have set 
the convergence criteria 1.0E-10. However SCF run doesn't stop after this is 
achieved. As copied below ethr went to 10^-11 at 108 th step and decreased 
10^-14 by 900th step. But didn't stop. My problem is why this is happening and 
how to control the convergence criteria to meet the given threshold.?



I played with mixing_mode, mixing_ndim etc... but it didn't help




Thank you


Jayangani

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