There are two options for java mode: descendtree, ignorenotshowing. Second one might help. Also ""Ancestor count"" helps alot, but if you already did both, you probably have a huge element tree (e.g. you have a huge dropdown list on screen) and Blueprism is really bad in that case, because it parses it each and every time by design it seems - try using other types of automation, surface should work.
