There are two reasons why the overall optimization results table might not show a system configuration that you asked HOMER Pro to model. First, only feasible system configurations appear in the optimization results tables. HOMER Pro discards infeasible configurations so they do not appear in the lists. Second, to limit file size, HOMER Pro does not store every single feasible system configuration in the overall optimization results table. By default, HOMER Pro stores only the top 200 configurations, but you can change that in File/Preferences.