THE FILENAME IS NOT VALID. Word displays this message if: ■ The filename is too long. Type a shorter name, maximum 8 characters, followed by a 3-letter extension. ■ You typed a character that is not valid in filenames. Correct the character or select a filename from the list. To open files: ■ To open documents and style sheets, choose File Open. ■ To open a glossary file, choose Edit Glossary Open Glossary.