Installation failed with 'An error occured unmounting the CD.' message

Solution Verified - Updated -

Issue

  • Installation failed with the following error messages.
An error occured unmounting the CD.
Please make sure you're not accessing /mnt/source from the shell on tty2 and then click OK to retry
  • It was failed when selecting all the packages available

Environment

  • Red Hat Enterprise Linux 5.8

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