CD problems

[Jeff Vian]

A friend of mine made a mistake creating two CDs and asked if I can 
help.  Maybe someone on this list has some ideas.

He made 2 CDs but somehow did not close out the session when he 
completed.  Now he cannot access the data on the disk. Yes, I can see 
that the disk was written, and that the closing tracks were not written.

When I insert the CD in my burner it tells me the disk is empty.
I can use either xcdroast or k3b but neither is able to see the 
contents.  AFAICT the disk was not written as a multi-session, but I am 
not sure of that.

What I want to do is be able to close out the session and hopefully 
access the data which is very important. (tax records, etc)

Trying to use dd to get the data from the cd does not work.  It creates 
an empty file.

Any useful ideas????

Jeff