Home > SQL Developer Dialog Boxes ... > No Connection Found
This dialog box is displayed when you attempt to perform an operation that requires a database connection, but no connection currently exists for that operation. For example, you might have opened a SQL file but not selected a connection, or the connection might have disconnected; or you might have tried to perform a schema copy operation without specifying both the From Schema and To Schema connections.
To select a connection in the SQL Worksheet, click OK to close this dialog box, then select a connection from the drop-down list in the SQL Worksheet icon bar.