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In a perfect world, "initial conditions O.K." is good. In a 9 bus test system you should have perfect models since the system is small to be perturbed by dynamic model errors. But simulation models are not perfect, especially when you are working on large systems. Some "INITIAL CONDITION SUSPECT" can be ignored or accepted if Dstate is about 0.0001. For North American base cases, gas turbine models would have some large "INITIAL CONDITION SUSPECT" Dstate but are ignored by planners and operators since these models are acknowledged to have errors in modeling.
