I am experiencing some strange behaviour using the Structural Search. I have checked the bugs at the below URL but it is not included. I can't believe it is a bug because it is too severe: you would have picked it up long ago. I must be doing something wrong but I can't figure out what. Here's the situaion: I specify a search using scope "Project Files". The search find results and they are all in the a pacakge called delegate (i.e. com.whatever.delegate). So I want to refine my search but I also want it to run more quickly. Wanting it to run more quickly, I reduce the scope. But I change one thing at a time, so at first I don't actually change the search at all, apart from narrowing the scope to the "delegate" package. The results I get should be exactly the same as before, logically. Instead I get no results. I have checked the definition of the narrow scope. It is selected using a special include/exlude type tree, but my selections in that tree actually result in a string specification. They also result in a status message stating the number of classes included in the scope. The status message is "Scope contains 18 of total 21,576 classes" 18 is correct, it is the number in the package. The strong generated to represent my constraints is " [Plugins]:com.idbs.ewb.delegate..*" I can only think that this string is being generated incorrectly or interpreted incorrectly.