Jdeveloper log window disappears

Problem:
Log window from Jdeveloper disappears. If we goto view->log, it does not reappear.

Solution:
For JDeveloper 10.1.3.4:-
Search for the windowinglayout.xml file.
Its present in the directory: <Jdev_Home>/jdev/system/oracle.ide.10.1.3.42.70

Rename or delete windowinglayout.xml file. After renaming/deleting it, we get our log window back on Jdeveloper again.

For JDeveloper 10.1.3.3:-
Search for the windowinglayout.xml file.
Its present in the directory: <Jdev_Home>/jdev/system/oracle.ide.10.1.3.41.57

Rename or delete windowinglayout.xml file. After renaming/deleting it, we get our log window back on Jdeveloper again.

Note:
JDeveloper saves the file after closure. So first close JDeveloper and then rename or delete the file.