That sounds like a different problem, and one that I encountered.

Scenario: Early model Astras - 00/01.

Turn the radio on with ignition OFF
Start the car - the radio or CD continues playing, uninterupted while the car starts (They usually cut out and then resume).

Blaupunkt discovered that this was causing a power spike in the head unit and causing them to not eject properly, so they rewrote the software as mentioned.

They supposedly fixed this in '02 and later models...

The CD ERROR isn't one that I've heard of...