At least one of the bars in the Area Reinforcement has a Bar Type or Shape that is incompatible with the Hook type. Check the Hook permissions for the Bar Type (see Hook Lengths) and the Hook and Rebar Shape styles.

public static FailureDefinitionId CannotUseAreaReinforcementHookTypeStyle { get; }

Public Shared ReadOnly Property CannotUseAreaReinforcementHookTypeStyle As FailureDefinitionId
	Get

public:
static property FailureDefinitionId^ CannotUseAreaReinforcementHookTypeStyle {
	FailureDefinitionId^ get ();
}