[Pw_forum] Eigenvalue not converged in ph.x

[see see]

Dear all,

I got a warning message when I was calculating a q-point:
"
     negative rho (up, down):  0.440E-01 0.000E+00
     Starting wfc are atomic

     total cpu time spent up to now is   2121.82 secs

     Band Structure Calculation
     Davidson diagonalization with overlap
     WARNING:     1 eigenvalues not converged
     WARNING:     1 eigenvalues not converged
     WARNING:     1 eigenvalues not converged
     WARNING:     1 eigenvalues not converged
     WARNING:     1 eigenvalues not converged
     WARNING:     1 eigenvalues not converged
     WARNING:     1 eigenvalues not converged
     WARNING:     1 eigenvalues not converged
     WARNING:     1 eigenvalues not converged
     WARNING:     1 eigenvalues not converged
     WARNING:     1 eigenvalues not converged
     WARNING:     1 eigenvalues not converged
     WARNING:     1 eigenvalues not converged
     WARNING:     1 eigenvalues not converged
     WARNING:     1 eigenvalues not converged
     WARNING:     1 eigenvalues not converged
     WARNING:     1 eigenvalues not converged
     WARNING:     1 eigenvalues not converged
     WARNING:     1 eigenvalues not converged
     WARNING:     1 eigenvalues not converged
     WARNING:     1 eigenvalues not converged
     WARNING:     1 eigenvalues not converged
     WARNING:     1 eigenvalues not converged
     WARNING:     1 eigenvalues not converged
     ethr =  5.26E-11,  avg # of iterations = 17.2
"

Could you tell me what is the problem come from?

Thanks you very much.

Best regards
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