[DFTB-Plus-User] SCC does not converge

[Yang Yang]

Dear Sir/Madam,

I always encounter the problem that the scc dos not converge for more than
800 steps. For a very simple case like a bare edge (9,0) carbon nanotube,
when I try to relax the structure it never converged. Could anyone help me
with that?

Best,
Yang
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