title: IBTOOL error 255 in XCODE 5 / work fine in XCODE 4
body: <p>I want to open and compil my project in XCODE 5 and i have an issue. IBTOOLS error 255. Does anybody have a idea for fix ? 
  I try all the answered of StackOverFlow, but nothing was good for the case. </p>
  
  <p>Alex. </p>
  
  <pre><code>    CompileStoryboard Safetracer/MainStoryboard.storyboard
      cd /Users/alexandrepestre/Documents/ThinkMyApp/Lixao/Safetracer
      setenv IBSC_MINIMUM_COMPATIBILITY_VERSION 6.1
      setenv PATH "/Applications/Xcode 2.app/Contents/Developer/Platforms/iPhoneOS.platform/Developer/usr/bin:/Applications/Xcode 2.app/Contents/Developer/usr/bin:/usr/bin:/bin:/usr/sbin:/sbin"
      setenv XCODE_DEVELOPER_USR_PATH "/Applications/Xcode 2.app/Contents/Developer/usr/bin/.."
      /Applications/Xcode\ 2.app/Contents/Developer/usr/bin/ibtool --errors --warnings --notices --minimum-deployment-target 6.1 --output-format human-readable-text --compile /Users/alexandrepestre/Library/Developer/Xcode/DerivedData/Safetracer-bdnzaaahcuqikggnpqlvwvrsbddt/Build/Products/Debug-iphoneos/safetracer.app/MainStoryboard.storyboardc /Users/alexandrepestre/Documents/ThinkMyApp/Lixao/Safetracer/Safetracer/MainStoryboard.storyboard
  
  2013-09-13 16:07:15.433 ibtoold[4775:707] [MT] DVTAssertions: Warning in /SourceCache/IDEInterfaceBuilderCocoaTouch/IDEInterfaceBuilderCocoaTouch-3742/IBPlugin/Documents/IBStoryboardMetricsInferrer.m:324
  Details:  Failed to push inherited simulated metrics to all scenes.
  Object:   &lt;IBStoryboardMetricsInferrer: 0x7f969aab4ad0&gt;
  Method:   -rebuildInferredMetrics
  Thread:   &lt;NSThread: 0x7f9699c191b0&gt;{name = (null), num = 1}
  Please file a bug at http://bugreport.apple.com with this warning message and any useful information you can provide.
  2013-09-13 16:07:19.057 ibtoold[4775:707] [MT] DVTAssertions: Warning in /SourceCache/IDEInterfaceBuilderCocoaTouch/IDEInterfaceBuilderCocoaTouch-3742/IBPlugin/Documents/IBStoryboardMetricsInferrer.m:324
  Details:  Failed to push inherited simulated metrics to all scenes.
  Object:   &lt;IBStoryboardMetricsInferrer: 0x7f969dacc750&gt;
  Method:   -rebuildInferredMetrics
  Thread:   &lt;NSThread: 0x7f9699c191b0&gt;{name = (null), num = 1}
  Please file a bug at http://bugreport.apple.com with this warning message and any useful information you can provide.
  2013-09-13 16:07:30.797 ibtoold[4775:707] [MT] DVTAssertions: ASSERTION FAILURE in /SourceCache/IDEInterfaceBuilderCocoaTouch/IDEInterfaceBuilderCocoaTouch-3742/IBPlugin/Utilities/IBObjectMarshalling.m:670
  Details:  Failed to compile nib consisting of IBProxyObject, IBProxyObject, IBProxyObject, IBProxyObject, IBUIButton, IBUIButton, IBUIButton, IBUIButton, IBUIButton, IBUIImageView, IBUIImageView, IBUIImageView, IBUIImageView, IBUIImageView, IBUILabel, IBUILabel, IBUILabel, IBUILabel, IBUILabel, IBUILabel, IBUILabel, IBUILabel, IBUILabel, IBUILabel, IBUILabel, and IBUIView.
  
  Interface Builder encountered an error communicating with the iOS Simulator. If you choose to file a crash report or radar for this issue, please check Console.app for crash reports for "Interface Builder Cocoa Touch Tool" and include their content in your crash report.
  
  Exception name: NSInvalidArgumentException
  Exception reason: NSConcreteAttributedString initWithString:: nil value
  Exception backtrace:
    0. CoreFoundation           0x0226e5c8 __exceptionPreprocess
    1. libobjc.A.dylib          0x01fed8b6 objc_exception_throw
    2. CoreFoundation           0x0226e3bb +
    3. Foundation               0x01be48c0 -
    4. Foundation               0x01be4761 -
    5. UIKit                    0x00ee50f6 -
    6. UIKit                    0x00ee54c7 -
    7. UIKit                    0x0112fa96 -
    8. UIKit                    0x011303e3 -
    9. UIKit                    0x0112f6b4 -
   10. UIKit                    0x0112fa96 -
   11. UIKit                    0x011303e3 -
   12. UIKit                    0x00d8995b -
   13. UIKit                    0x0112fa96 -
   14. UIKit                    0x011303e3 -
   15. UIKit                    0x0112f6b4 -
   16. UIKit                    0x0112fa96 -
   17. UIKit                    0x011303e3 -
   18. ???                      0x00014c80
   19. ???                      0x00014e4e
   20. ???                      0x00015363
   21. ???                      0x00007565
   22. IBFoundation             0x00360701 __72-[IBMessageReceiveChannel deliverMessage:toTarget:withArguments:result:]_block_invoke
   23. IBFoundation             0x00360446 -
   24. IBFoundation             0x00360123 __80-[IBMessageReceiveChannel runBlockingReceiveLoopNotifyingQueue:notifyingTarget:]_block_invoke
   25. libdispatch.dylib        0x029c3444 _dispatch_barrier_sync_f_slow_invoke
   26. libdispatch.dylib        0x029d44b0 _dispatch_client_callout
   27. libdispatch.dylib        0x029c2766 _dispatch_main_queue_callback_4CF
   28. CoreFoundation           0x022d3a5e __CFRUNLOOP_IS_SERVICING_THE_MAIN_DISPATCH_QUEUE__
   29. CoreFoundation           0x0221472b __CFRunLoopRun
   30. CoreFoundation           0x02213b33 CFRunLoopRunSpecific
   31. CoreFoundation           0x0221394b CFRunLoopRunInMode
   32. Foundation               0x01c23c05 -
   33. ???                      0x00036b67
   34. ???                      0x00036c62
   35. ???                      0x00036dc7
   36. ???                      0x0000c20e
   37. libdyld.dylib            0x95727725 start
  Exception info:{
  }
  
  Function: void IBAssertMarshallingFailure(NSString *__strong, NSString *__strong)
  Thread:   &lt;NSThread: 0x7f9699c191b0&gt;{name = (null), num = 1}
  Hints: None
  Backtrace:
    0  0x000000010d20ff2a -[DVTAssertionHandler handleFailureInFunction:fileName:lineNumber:messageFormat:arguments:] (in DVTFoundation)
    1  0x000000010d20f684 _DVTAssertionHandler (in DVTFoundation)
    2  0x000000010d20f984 _DVTAssertionFailureHandler (in DVTFoundation)
    3  0x0000000112774df6 IBAssertMarshallingFailure (in IDEInterfaceBuilderCocoaTouchIntegration)
    4  0x000000011285b59a (in IDEInterfaceBuilderCocoaTouchIntegration)
    5  0x000000011285ba0d (in IDEInterfaceBuilderCocoaTouchIntegration)
    6  0x000000011286b445 (in IDEInterfaceBuilderCocoaTouchIntegration)
    7  0x000000011286f4b0 (in IDEInterfaceBuilderCocoaTouchIntegration)
    8  0x000000011287063e (in IDEInterfaceBuilderCocoaTouchIntegration)
    9  0x000000010c64c40a IBWithAutoInvalidationPool (in IDEInterfaceBuilderKit)
   10  0x0000000112870363 (in IDEInterfaceBuilderCocoaTouchIntegration)
   11  0x0000000112856316 (in IDEInterfaceBuilderCocoaTouchIntegration)
   12  0x000000011285683c (in IDEInterfaceBuilderCocoaTouchIntegration)
   13  0x000000010c39b2fe __47-[IBDocument compiledPackageWithOptions:error:]_block_invoke (in IDEInterfaceBuilderKit)
   14  0x000000010c3be250 -[IBDocument assertIfArbitrationIsScheduledDuring:] (in IDEInterfaceBuilderKit)
   15  0x000000010c39b272 -[IBDocument compiledPackageWithOptions:error:] (in IDEInterfaceBuilderKit)
   16  0x000000010c17c757 (in ibtoold)
   17  0x000000010c17fc21 (in ibtoold)
   18  0x000000010c18a23d (in ibtoold)
   19  0x000000010c18a781 (in ibtoold)
   20  0x000000010c18a654 (in ibtoold)
   21  0x000000010c188ade (in ibtoold)
   22  0x000000010c189eb2 (in ibtoold)
   23  0x000000010c189610 (in ibtoold)
   24  0x00007fff8be7a7e1 start (in libdyld.dylib)
   25  0x0000000000000001
  Command /Applications/Xcode 2.app/Contents/Developer/usr/bin/ibtool failed with exit code 255
  e
  </code></pre>