Switch -ONI - allow potentially incompatible names
While NTFS file system permits file names with trailing spaces and dots, a lot of Windows programs fail to process such names correctly. If this switch is not specified, WinRAR removes trailing spaces and dots, if any, from file names when extracting. Specify this switch if you need to extract such names as is.
Switch -oni is the command line equivalent of "Allow potentially incompatible names" option in extraction dialog.