If the Show advanced model equation controls options in components Advanced Project option is active, the Always create error checkbox is shown on components that are able to add an error equation to the model such as several of the Power control and Scheduling components. With this option active, an error is always added to the model to ensure the same equation set is used in a case regardless of the component being active or not (for numerical stability reasons or in cases where the model is externally controlled using the GSP API). If the error equation is added but the component is not active (unchecked Active check box on general tab sheet), a dummy equation is used instead to maintain numerical consistency using a state with a number specified in the Corresponding state nr. for deactivation field. Usually the corresponding state is a control input with the the Always create state option set.
Always Create Error
