I have an installshield project that is set to overwrite 15 files in a folder tree. 3 files in the upper folder install correctly. A second level folder where 7 files are installed installs correctly. The last 4 files will not overwrite. These files are four files which exist in a larger second level folder. If I overwrite all files in the folder they will overwrite. If I select just these four files to overwrite, they will not. Any idea why??