Some ribbon tabs are associated with license features. Depending upon the tab you
have invoked, additional units may be drawn. These features will be checked out for the
duration of the session.
When you select a tab on the ribbon and the following license error message is
displayed, you should check in specific license features to draw sufficient Altair units.
To check in specific license features:
Exit from the tab you want to check in by selecting a different ribbon
tab.
Right-click the tab you want to check in, and then select Check in
License Feature.
Or you can check in a license feature by hiding the tab
altogether. From the View menu, select
Ribbons, then turn off the tab you want to check in and
hide.