HI
I have a workbook which has a code with the following structure:

Private Sub Workbook_Open()
Subname1
End sub

The structure of each sub is 

Sub subname1()
    Application.DisplayAlerts = False
    Application.ScreenUpdating = False	
Code that open and close several files to copy and paste data from that files into the workbook
    Application.DisplayAlerts = true
    Application.ScreenUpdating = true
End Sub
Even using the application screenupdating I can see how the subname1 goes and open go to the sheets and close files to copy and paste.

Any idea why this is happening?. I used in the past the property to copy and paste data from one sheet to another and worked fine, so I am not sure why this time is not working, the difference this time is that I am using external data from other workbooks

Best regards