Rational Application Developer (RAD) V 7.0 sometimes functions weird, the search menu is all disabled in all the perspectives and views.
The temporary solution is to click the Search Icon 
Alternatively use the shortcut Ctrl+H, which brings the same widget .
This issue seems to be a bug in Eclipse. It is sporadic. Generally a restart of the IDE would resolve the issue. Sometimes even a restart has no effect. I guess until the patch arrives we are stuck with this 
