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I don’t understand your questions. I don’t know what an "outer SCF" is, or what you mean by "is PSI4 could increase the iterations". Do you mean "Can I increase the number of iterations spent in the SCF cycle before Psi4 stops gives up trying to converge it?"
As for your second question, are you asking how can I reduce e_convergence or should I reduce e_convergence, or something else?