While loading data make all the components disabled in adobe flex -

I have a vertical tab-bar with 4 objects with different tabs, all four items from the same XML file , Which is a large file when a user clicks on a tab, while the data is being loaded, this error has been shown.

typeError: Error # 1009: Null object can not use context or method of reference.

I want to disable all tabs during the XML tab Loading.

You can set the main application to disable; Use all the children who should disable the property and set it to false If you also want to stop the conversation of a mouse, be sure to set the mouse assigned property incorrect.