Xcode 4.2 - Can't add Allocations instrument


I have followed the steps on pages 345-348, choosing the Allocations instrument, and when the Instruments window opens I have nothing in the left-hand column. If I try to drag the Allocations instrument there nothing happens (it doesn’t “stay” there). I’ve tried a few of the other instruments from the library and those I am able to drag onto the main Instruments window. Just not Allocations or Leaks.

I’ve Googled my fingers to the nubs and found nothing. Ideas?


Finally found the time to uninstall/reinstall 4.2.1 - problem resolved.