Для ActiveViewIndex устанавливается значение '<var>X</var>'. Оно должно быть меньше текущего числа элементов управления View '<var>Y</var>'. Динамически добавленные представления должны быть добавлены до события Page_PreInit или в него.

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ActiveViewIndex is being set to '<var>X</var>'. It must be smaller than the current number of View controls '<var>Y</var>'. For dynamically added views, make sure they are added before or in Page_PreInit event.

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