VB.NET
 

Hi,
I coded a program in VB.NET that populates an Excel file,
getting data from a certain list of other Excel files.
It seem that the process goes fairly well, but when I try
to open the updated file (and source files), a cannot open
or cannot see the file through Excel.
I opened the file with other editor and see that the data
are there.
Any idea whay it happens.

Note: there are no Excel instances active in my PC after
the program finishes.
Thanks