CCNA, CCNP, MCSA, CCNA Final Exam, All Answer Test Module With 100/100

Help, I'm at wits end -- sometimes my Xcode runs -- sometimes it doesn't I keep getting I installed Xcode 4.1 then upgraded to 4.2 I can't even run a freshly made project :( ProcessPCH /Users/david/Library/Developer/Xcode/DerivedData/iDecide-eurvfbqsagnsmkgdvuhytbalyxkj/Build/PrecompiledHeaders/iDecide-Prefix-fjnitkqizspbsgezzdhvfinujnhz/iDecide-Prefix.pch.pth iDecide/iDecide-Prefix.pch normal i386 objective-c com.apple.compilers.llvm.clang.1_0.compiler cd /Users/david/Documents/tmp/iDecide setenv LANG en_US.US-ASCII setenv PATH "/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin:/Developer/usr/bin:/Users/david/.rvm/gems/ruby-1.9.2-p180/bin:/Users/david/.rvm/gems/ruby-1.9.2-p180@global/bin:/Users/david/.rvm/rubies/ruby-1.9.2-p180/bin:/Users/david/.rvm/bin:/Users/david/apache-maven-3.0.3/bin:/usr/local/bin:/usr/bin:/bin:/usr/sbin:/sbin:/usr/X11/bin:/System/Library/Java/JavaVirtualMachines/1.6.0.jdk/Contents/Home/bin:/usr/local/Cellar/android-sdk