How does PBI lock files? I looked in the source folder and there is no temp file there. I have rebooted the machine again but I am still unable to open the file. Even with the machine switched off and trying to open the file from another machine yeilds the same response on that machine. I copied the file and can open the copy fine to the structure is intact. The obvious solution is to then delete the original and rename the the copy to the original however Windows will not allow me to delete it saying it is in use by another user.