Some tests are designed to run once using a particular IxOS version.
Later, to execute same test cases with different IxOS version, specify the required IxOS version in the session profile.
To include an IxOS version in the drop-down list, please refer KB FAQ13410.
Note: Remember that each session profile is associated with a single IxOS version. To enable a test to run on multiple IxOS versions, you must first create a session profile for each IxOS version and the test must then use each session profile in turn.