Importing from exported projects allows you to quickly migrate projects between instances in Silk Central. With this, though there are some errors you may see when permission this action one of which could be:
Cannot drop the table 'KMT_1487800753794', because it does not exist or you do not have permission.
This error indicates that the either the user does not have permission to perform this action or that there is no space available on the database server.
To check this ensure the user that you are connected to Silk Central as has the role db_owner, if not add this role to the user account. If you are sure of this login to the database server, and verify that there is space to perform this action.
If you have any issues or questions on export/import let us know through Support Line.