This message occurs if you are not using the latest Arabic design-time Xtension.
The solution depends on the version of Windows that you are using:
•If you are using Windows XP, then simply go to the Tools => Install/Update Arabic UI Support menu sequence.
•If you are using Windows 7, or above, then you need to:
c.go to the Tools => Install/Update Arabic UI Support menu sequence.
e.re-launch Q++ normally (ie. not as Administrator).