Only for unocc calculations. Specifies the number of extra states that will be considered for reaching the convergence. Together with ExtraStates, one can have some more states which will not be considered for the convergence criteria, thus making the convergence of the unocc calculation faster. By default, all extra states need to be converged.
states/states_elec.F90 : 338
call parse_variable(namespace, 'ExtraStatesToConverge', nempty, nempty_conv)