Thank you gentlemen. It must be a local issue on this particular machine.
>> Since you have two different DVD devises have you tried switching your DVD â€œReadingâ€ and â€œWritingâ€ devices and see if this corrects your problem?
Yes, both devices on this machine fail to read this disc while reading other DVDs just fine.
I tried it on my son's machine and it works fine there (Sony DVD ROM drive.) So I will troubleshoot the optical drive issues on my machine. Your confirmations got me unstuck. My original disc is fine. It appears to be a hardware/software issue on one particular machine. Thanks for the quick responses!