Hello tsiriaks
Thanks for your reply and suggestions.

I tried your first resolution but it didn't worked for me and second one is based on CAD Configuration Manager, so i am using student version of Ansys 18.2 it doesn't come with CAD Configuration Manager.
The third resolution is about registry path of Spaceclaim and it is in correct path.
So, the above methods didn't worked for me.

Please give me a solution for it and i am struggling with it from 1 week.

Thank you.