What should I do if I must reformat the hard drive on my computer?
What should I do if I am upgrading the operating system on my computer?
If you do not have to reformat your hard drive to do the upgrade, your licenses stay on your computer in the Rational/Common directory. After you perform the upgrade, all of your licenses should still be available. If you must reformat the disk, see the previous question.
What if my license .dat files get deleted?
Go to License Key Center and get copies of the license files.
The host ID ffffffff is not valid. Why?
"ffffffff" is the value listed in the host ID field in the License Manager. When you initialized your disk, your disk did not receive a disk_serial_num. Although the software accepted this entry, licensing services regards this value as invalid. You can reset your host ID by using vendor disk utility tools. Another option is to use the Ethernet card address instead of the host ID.
I changed my file system from FAT to NTFS, which changed my host ID. Could you please change my key to make it work again?
OR
I changed my system disk and the licenses no longer work.
The license keys are generated for a specific host name and host ID. You have to return the license keys to your IBM Rational® account and then request license keys for the new host ID. To perform these transactions, go to License Key Center.