Symptom:
Copy and paste error: /opt/caldera/var/tmp/CopyCutPaste.ent: Permission denied
Problem:
The file permissions are managed by the Operating System, and all applications (including Caldera) has to adhere to these permission rules.
It is a bit strange that Caldera would be denied access to the tmp folder, but you can try and resolve the issue by changing the permissions.
Solution:
Open your Terminal and copy and paste the following command:
sudo chmod 777 /opt/caldera/var/tmp/