I am using Excel to write xls files. When I try to replace an existing file it displays the replace file dialog box. Is there a way to force Excel to replace the existing files without displaying the dialog box (programmatically from within LabVIEW vi). I am attaching the vi's. Top level vi is MEPU-WriteTableToXL.vi and I'm saving the file in MEPU-SaveExcelFile.vi. Please help.