The CD-Recorder wasn't able to find a requested location on the CD. This is most likely caused by bad or dirty media, or a file system generation problem.
Check for faulty or disconnected cables between your computer and your CD-Recorder.
Check for improper termination of the bus (SCSI only).
Try a different brand of CD-R media.
See the documentation provided with your CD-Recorder or contact the manufacturer of the drive.