[QE-users] Internal error, cannot bracket Ef in adsorption calculation

[a.pramos]

Hello everyone,

I'm performing some calculations to obtain the adsorption energy of 
certain molecules on different surfaces. After the relaxation of the 
surface, I put the species near the adsorption site and perform a relax 
calculation. However, the following error appears:
      Error in routine efermig (1):
      internal error, cannot bracket E

I have tried different parameters (removing the assume_isolated='2D' 
keyword, increasing the vaccuum layer, increasing the k-grid in all 
three directions...) but the error persists. I attach one of my input 
files with its corresponding output.

Best regards,
Álvaro
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