Build Version in XCode, error!

Hi, I Building Version in XCode and receive this error…

Setting up Mono
Building UBT…
0 Error(s)
Building UE4Editor…
Running command : Engine/Binaries/DotNET/UnrealBuildTool.exe UE4Editor Mac Debug -deploy
Compiling with Mac SDK 10.9
Building UnrealHeaderTool…
Compiling with Mac SDK 10.9
Target is up to date.
Parsing headers for UE4Editor
LogTextLocalizationManager:Warning: The selected culture ‘pt_BR’ is not available; falling back to ‘en’
LogCompile:Error: Duplicate class name: USlateTypes also exists in file /Script/SlateCore
LogCompile:Error: Duplicate class name: USlateWidgetStyleAsset also exists in file /Script/SlateCore
LogCompile:Error: Duplicate class name: USlateWidgetStyleContainerBase also exists in file /Script/SlateCore
LogCompile:Error: Duplicate class name: USlateWidgetStyleContainerInterface also exists in file /Script/SlateCore
LogCompile:Error: Duplicate class name: UBorderComponent also exists in file /Script/SCWRuntime
LogCompile:Error: Duplicate class name: UBoxPanelComponent also exists in file /Script/SCWRuntime
LogCompile:Error: Duplicate class name: UButtonComponent also exists in file /Script/SCWRuntime
LogCompile:Error: Duplicate class name: UCanvasPanelComponent also exists in file /Script/SCWRuntime
LogCompile:Error: Duplicate class name: UCheckBoxComponent also exists in file /Script/SCWRuntime
LogCompile:Error: Duplicate class name: UCircularThrobberComponent also exists in file /Script/SCWRuntime
LogCompile:Error: Duplicate class name: UEditableTextBlockComponent also exists in file /Script/SCWRuntime
LogCompile:Error: Duplicate class name: UGridPanelComponent also exists in file /Script/SCWRuntime
LogCompile:Error: Duplicate class name: UImageComponent also exists in file /Script/SCWRuntime
LogCompile:Error: Duplicate class name: UScrollBoxComponent also exists in file /Script/SCWRuntime
LogCompile:Error: Duplicate class name: USlateLeafWidgetComponent also exists in file /Script/SCWRuntime
LogCompile:Error: Duplicate class name: USlateNonLeafWidgetComponent also exists in file /Script/SCWRuntime
LogCompile:Error: Duplicate class name: USlateWrapperComponent also exists in file /Script/SCWRuntime
LogCompile:Error: Duplicate class name: USpacerComponent also exists in file /Script/SCWRuntime
LogCompile:Error: Duplicate class name: USpinningImageComponent also exists in file /Script/SCWRuntime
LogCompile:Error: Duplicate class name: UTextBlockComponent also exists in file /Script/SCWRuntime
LogCompile:Error: Duplicate class name: UThrobberComponent also exists in file /Script/SCWRuntime
/Users//UnrealEngine-4.2/Engine/Source/Runtime/SlateCore/Public/Styling/SlateTypes.h(1365) : LogUObjectHash:Error: Ambiguous search, could be Class /Script/Slate.SlateWidgetStyleContainerBase or Class /Script/SlateCore.SlateWidgetStyleContainerBase
/Users//UnrealEngine-4.2/Engine/Source/Runtime/SlateCore/Public/Styling/SlateTypes.h(1365) : Unparsed class ‘SlateWidgetStyleContainerBase’ found while validating DependsOn entries for ‘SlateWidgetStyleAsset’
Error: Failed to generate code for UE4Editor - error code: 2
UnrealHeaderTool failed for target ‘UE4Editor’ (platform: Mac, module info: /Users//UnrealEngine-4.2/Engine/Intermediate/Build/Mac/UE4Editor/Debug/UnrealHeaderTool.manifest).
Command /Users//UnrealEngine-4.2/Engine/Build/BatchFiles/Mac/Build.sh failed with exit code 2

Hi ,

Please post this to the answerhub at http://answers.unrealengine.com for further assistance. Thank you!

ok, Thanks!