[Pw_forum] Scf can converge, But Band can not converge

[Weiguang Chen]

Hi,
I am a pwscf newbie, i want to get a band structure. Firstly, i have done
the scf calculation,and it can be converged well, but the next step band
calculation, the following information show:
     Band Structure Calculation
     Davidson diagonalization with overlap
     c_bands:  1 eigenvalues not converged
     c_bands:  1 eigenvalues not converged
     c_bands:  1 eigenvalues not converged
     c_bands:  1 eigenvalues not converged
     c_bands:  1 eigenvalues not converged
     c_bands:  1 eigenvalues not converged
     c_bands:  1 eigenvalues not converged
     c_bands:  1 eigenvalues not converged
     c_bands:  1 eigenvalues not converged
     c_bands:  1 eigenvalues not converged
     c_bands:  1 eigenvalues not converged
     c_bands:  1 eigenvalues not converged
     c_bands:  1 eigenvalues not converged
%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%
     from davcio : error #        10
     error while reading from file
 %%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%%

     stopping ...

What's the probably problem?How can i do?
Thanks
-- 
Best Wishes
ChenWeiguang
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