If your recostar design studio gives below error:
The issue that you are observing with recostar design studio is because this message indicates that the system that your are running on is not licensed. The system runs in demo mode. Demo mode is slow and is limited to a certain number of characters. If you exit RecoStar Design Studio (RDS) and then then restarts then you can continue to run in demo mode and may temporarily fix the issue.The license that Ephesoft use is a run-time license that allows RecoStar to run from within our application.
However, If you still face the issue then, try to install the the attached license (Recostar License).