Hi, 

  I have the same question on changing the Q_thresh in meep.hpp
  Can I just modify the file "meep.hpp" under the installation folder
  /usr/local/include/meep.hpp 

  Or I will have to recompile the meep?

   I am calculating the band structure of a metal wire array where the metal is
described using dispersive model with loss. I noticed missing points near the
band edge and the Q value of the modes found decrease to ~60 right before the
missing points. Also decreasing the loss (gamma) will make the missing points
show up again with Q larger than 50. 

  I think it would make sense that decrease the Q_thresh will let the harminv
find some new modes that has Q <50. I tried it but the result remains the same. 

thank you









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