.Error: Base type for error messages sent by file system methods. .DirectoryCreateError: An error occured while creating a directory. .DirectoryRemoveError: An error occured while removing a directory. .DirectoryOpenError: An error occured while opening a directory. .FileRemoveError: An error occured while removing a file. .FileRenameError: An error occured while renaming a file. .FileSetPermissionsError: An error occured while setting permissions for a file.