[Pw_forum] convergence NOT achieved, stopping

[Mahmoud Payami]

Dear PW users,

I have checked example03 which deals with CO dimer and changed the input file appropriate for O2 case which gives a bond legth of 2.322 bohrs.
Further, I prepared the input for O3 case but I encounter with the message (after 1000 iterations):
 
convergence NOT achieved, stopping

I tried again with a mixing factor of beta=0.1 but nothing new happened.
 For information, the initial positions of O atoms are (-3,0,0), (3,0,0) and (0,3,0).
I would be grateful if somebody comments how to manage it.

Best regards,
Mahmoud Payami
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