I am writing a program that opens a files(well many but one at a time) and puts the all the fiels data into one workbook. The problem is that i am trying to allow it so many users can run this program. A problem i have is that when a backup file is created, it gives an error to the user trying to open the file. Is there a way to prevent the backup file from being made? Maybe a parameter is the .open function in VBA .NET?