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Hello Friends, I have installed the v7 of Mathematica. I created a Notebook with many "Buttons", many of them are for import XLS files. The buttons are generated as follows: Button["Buscar XLS", tabla1 SystemDialogInput["FileOpen"]] and work very well, but if i close Mathematica and then re-open the notebook. I press the "Button" but the variable "tabla1" are empty (should contain the path of the selected file).Therefore, I need to press shift-enter to resume using the "Button". Is there any way that the Buttons are automatically activated when opening the ".nb" file?. Thank you very much, Regards, Francisco Chavez Santiago, Chile.