I'm using Adaptec software to save genealogical files on CD-R's. For census images, the file names include alphanumeric characters and the dash symbol. To help locate files more easily, I use rather long file names that are very descriptive. Recently I filled my first CD and decided to "close" the CD. (The Adaptec software says the CD must be "closed" so it can be read on virtually any other CD reader on any computer.) During the closing process, error messages appeared saying my file names were not acceptable. There was no mention of a specific problem with the file names but the software offered alternative names that appeared to be shorter. It looks like several characters at the end of each file name were replaced with a tilde. I've scoured Adaptec information for any guidance about file names but haven't found a thing. Does anybody on the list know what the rules are for file names on CD's? Thanks in advance. Dick Felts Penfield, NY