File name restrictions 3k

• The file names must have 8 characters and the file extension must have 3 characters (8.3 format).

• Characters permitted for the file name and file extension are : "A", ... "Z", "a", ... "z" and "0", ... "9"

• The following file extensions are reserved for internal use only and may not be used for customer application: .obr, .obw, .obc, .dbs, .prg, .bin, .clf, .msg