I am getting "Limitation reached " error when i try to launch infobase in debug mode. (by pressing F5)

How to handle this problem? And why is this happening?

Appreciate your help.  

You can buy a full version of 1C:Enterprise platform. You can also check the How to buy section for more details.

You probably have more than one connection at the same time. Try to quit all session and open designer again. If this does not help try to delete some records.

Buying paid version is the solution too, but a lot more expensive  

Thanks Alexey!
It worked.