我正在开发 iOS 应用程序，
我今天已经将我的 Mac 操作系统从 Lion 升级到了 Mountain Lion，并且我正在使用Xcode 4.6(iOS 5)lion。
但现在在山狮，我已经安装了Xcode 5 DP，
现在，当我尝试在其中运行我的应用程序时，Xocde 4.6它会显示这样的错误，
ibtoold[2032:707] [MT] DVTAssertions: ASSERTION FAILURE in /SourceCache/IDEInterfaceBuilder/IDEInterfaceBuilder-3084/Framework/Document/IBObjectContainer.m:336Details: ID is too lowObject: <IBObjectContainer: 0x401134c20>Method: -setMaxID:Thread: <NSThread: 0x40030a260>{name = (null), num = 1}Hints: NoneBacktrace: 0 0x0000000101c84ec3 -[DVTAssertionHandler handleFailureInMethod:object:fileName:lineNumber:messageFormat:arguments:] (in DVTFoundatio 1 0x0000000101c84cf4 _DVTAssertionFailureHandler (in DVTFoundatio 2 0x000000010130ffda -[IBObjectContainer setMaxID:] (in IDEInterfaceBuilderKi 3 0x0000000101298f31 -[IBDocument unarchiveDocument:] (in IDEInterfaceBuilderKi 4 0x000000010142af22 -[IBDocumentUnarchiver recurseWithElement:kind:invokingBlock:] (in IDEInterfaceBuilderKi 5 0x000000010142b0f6 -[IBDocumentUnarchiver unarchiveDocument:] (in IDEInterfaceBuilderKi 6 0x0000000101293cfb __47-[IBDocument readFromFileWrapper:ofType:error:]_block_invoke (in IDEInterfaceBuilderKi 7 0x00000001012b6ea4 -[IBDocument runBlockInNewArbitrationStackEntryWithBehavior:block:] (in IDEInterfaceBuilderKi 8 0x0000000101293b14 -[IBDocument readFromFileWrapper:ofType:error:] (in IDEInterfaceBuilderKi 9 0x0000000105232019 (in IDEInterfaceBuilderCocoaTouchIntegratio 10 0x00000001052da154 (in IDEInterfaceBuilderCocoaTouchIntegration 11 0x0000000105232094 (in IDEInterfaceBuilderCocoaTouchIntegration 12 0x00007fff97d2e527 -[NSDocument readFromURL:ofType:error:] (in AppKit 13 0x000000010128e2d1 __39-[IBDocument readFromURL:ofType:error:]_block_invoke (in IDEInterfaceBuilderKit 14 0x00000001012b0f9a -[IBDocument invokeWithUndoSuppressed:] (in IDEInterfaceBuilderKit 15 0x000000010128e08d -[IBDocument readFromURL:ofType:error:] (in IDEInterfaceBuilderKit 16 0x00000001011ab170 (in ibtoold 17 0x00000001011a750f (in ibtoold 18 0x00000001011a6792 (in ibtoold 19 0x00000001011a6640 (in ibtoold 20 0x00000001011b2f5d (in ibtoold 21 0x00000001011a61a2 (in ibtoold 22 0x00000001011aa2ad (in ibtoold 23 0x00000001011a4f74 (in ibtoold 24 0x000000000000000Command
/Applications/Xcode.app/Contents/Developer/Platforms/iPhoneSimulator.platform/Developer/usr/bin/ibtool 失败，退出代码为 255
我现在该怎么办 ？
提前致谢。