In Xcode 5.1.1 'Find In Project' seems to be behaving erratically. Sometimes it doesn't find targets. I double checked in the Find Navigator: scope of search is "In Project" and the search modifier "Ignoring Case" is selected. Some target text is found successfully, and other target text is not found - even when it occurs within THE SAME SOURCE FILEs.
For example I can Find In Project "theHousehold" (a property name), with multiple source files and occurrences located. But if I search for "NSAssert", Find In Project returns 'No Results Found for "NSAssert"' - even though a local file Find of the same text is successful.
Here's a clue or perhaps a red herring - sometimes when searching with the Standard Editor's Find, the count of occurrences goes to zero - even for text that it successfully finds. Does Xcode build a full text search index, and can I trigger a rebuild of it?
I am pretty sure this has worked in the past. I have already tried "Clean Build Folder" and restarted Xcode. I don't see any prefs or settings that I might have munged - I'm stumped.