In my application, by design I move files from one folder to another.

I open the file, makes some changes to cells and save the file to another
folder, finally use Kill to remove it from the source folder. The new file
is then closed.

Most of the time this works, on the corporate network I occasionally get a
failure, where the new file is created but the old file is not killed.
Users have the right access rights to the server.

Q1. Why might this happen?
Q2. Can I apply a delay or some other action to prevent, warn or otherwise
fix this.

Sample of the code sequence in VBA code - as follows

' store old file name
sOldFile = ThisWorkbook.FullName

' file saved in different place and name
Application.DisplayAlerts = False
ThisWorkbook.SaveAs sPath & sFile
Application.DisplayAlerts=True

' remove old file
Kill sOldFile

' close the new file
ThisWorkbook.Close savechanges:=False

--

Regards,
Nigel