It may be related to whether the Tuning pack (and possibly the diagnostics pack) is licensed. In Tools|Preferences|Database|Licensing, you can specify which of the option packs are licenced per connection.
All 3 options were unchecked.
I checked them but still persist.
The DBA view's Performance node expands for me on 4.0.1 against an 220.127.116.11 database with the just the Tuning Pack license checkbox enabled. This could be one of those situations where...
1. The database to which you connect is a release prior to 10g R1, when the Tuning Pack became available.
2. You are possibly hitting a bug caused by not using a recent version of the Java 7 JDK, say jdk1.7.0_51 or higher.
3. Your user preferences for 4.0.1 got corrupted somehow.
So if (1) is not the reason, verify and upgrade the JDK if necessary, then consider starting with newly migrated, or new default, user settings. Just...
1. Exit SQL Developer, delete/rename system18.104.22.168.48, restart SQL Developer (possibly without migrating user settings).
2. Download and installed the 4.0.2 patch now available. Start SQL Developer (possibly without migrating user settings).
Hope this helps,
SQL Developer Team
Thank you Gary.
It worked perfectly with 4.0.2 version.