title: Unable to build a W10 UWP app in "Release" when referenced more than one API-Extension
body: <p>In my Windows 10 Universal app I referenced <code>Windows Mobile Extensions for the UWP</code> as well as <code>Windows Desktop Extensions for the UWP</code>. Everything works well and compiles in "Debug", but the error below appears when trying to compile in "Release". When referenced only one Extension, the app also compiles in "Release".</p>
  
  <blockquote>
    <p>Fehler        Der Befehl ""C:\Program Files (x86)\MSBuild\Microsoft.NetNative\x86\ilc\ilc.exe"
    /in:"C:\Users\myName\PROJECTS\myApp\myApp\obj\x86\Release\ilc\in"
    /out:"C:\Users\myName\PROJECTS\myApp\myApp\bin\x86\Release\ilc"
    /intermediatespath:"C:\Users\myName\PROJECTS\myApp\myApp\obj\x86\Release\ilc\intermediate"
    /v:normal /keepintermediates:true /buildtype:ret /exename:"myApp.exe"
    /makepripath:"C:\Program Files (x86)\Windows
    Kits\10\bin\x64\MakePri.exe"
    /appPriProjectRoot:"C:\Users\myName\PROJECTS\myApp\myApp"
    /rcpath:"C:\Program Files (x86)\Windows Kits\10\bin\x86\rc.exe"
    /targetplatformsdklibpath:"C:\Program Files (x86)\Windows
    Kits\10\lib\10.0.10240.0\um"
    /targetplatformsdkmetadatapath:"C:\Users\myName\PROJECTS\myApp\myApp\obj\x86\Release\ilc\in\WinMetadata"
    /targetframeworkpath:"C:\WINDOWS\Microsoft.NET\Framework\v4.0.30319"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.ApplicationModel.Activation.ActivatedEventsContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.ApplicationModel.Activation.ActivationCameraSettingsContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.ApplicationModel.Activation.ContactActivatedEventsContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.ApplicationModel.Activation.WebUISearchActivatedEventsContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.ApplicationModel.Background.BackgroundAlarmApplicationContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.ApplicationModel.Calls.CallsPhoneContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.ApplicationModel.Calls.CallsVoipContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.ApplicationModel.Calls.LockScreenCallContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.ApplicationModel.CommunicationBlocking.CommunicationBlockingContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.ApplicationModel.Resources.Management.ResourceIndexerContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.ApplicationModel.Search.Core.SearchCoreContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.ApplicationModel.Search.SearchContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.ApplicationModel.SocialInfo.SocialInfoContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.ApplicationModel.Wallet.WalletContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Devices.Custom.CustomDeviceContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Devices.Portable.PortableDeviceContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Devices.Printers.Extensions.ExtensionsContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Devices.Printers.PrintersContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Devices.Scanners.ScannerDeviceContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Devices.SmartCards.SmartCardBackgroundTriggerContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Devices.SmartCards.SmartCardEmulatorContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Devices.Sms.LegacySmsApiContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Embedded.DeviceLockdown.DeviceLockdownContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Gaming.Preview.GamesEnumerationContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Globalization.GlobalizationJapanesePhoneticAnalyzerContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Graphics.Printing3D.Printing3DContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Management.Deployment.Preview.DeploymentPreviewContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Management.Workplace.WorkplaceSettingsContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Media.Capture.AppCaptureContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Media.Capture.CameraCaptureUIContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Media.Devices.CallControlContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Media.MediaControlContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Media.Playlists.PlaylistsContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Media.Protection.ProtectionRenewalContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Networking.NetworkOperators.LegacyNetworkOperatorsContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Networking.NetworkOperators.NetworkOperatorsFdnContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Networking.Sockets.ControlChannelTriggerContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Phone.PhoneContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Phone.StartScreen.DualSimTileContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Security.EnterpriseData.EnterpriseDataContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Security.ExchangeActiveSyncProvisioning.EasContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Services.Maps.GuidanceContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Services.Maps.LocalSearchContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.System.Profile.ProfileHardwareTokenContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.System.Profile.ProfileRetailInfoContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.System.Profile.SystemManufacturers.SystemManufacturersContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.System.UserProfile.UserProfileContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.System.UserProfile.UserProfileLockScreenContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.UI.ApplicationSettings.ApplicationsSettingsContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.UI.Core.AnimationMetrics.AnimationMetricsContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.UI.Core.CoreWindowDialogsContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.UI.WebUI.Core.WebUICommandBarContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.UI.Xaml.Hosting.HostingContract\1.0.0.0"
    /externalReferencePath:"C:\Program Files (x86)\Windows
    Kits\10\References\Windows.Web.Http.Diagnostics.HttpDiagnosticsContract\1.0.0.0"
    /RdXmlPath:"C:\Program Files
    (x86)\MSBuild\Microsoft.NetNative\LibraryXML"
    /suppressPDBWarnings:true /AllowNoManagedCode /UseCustomFramework
    "/logger:CsvLogger;4288;2796"" wurde mit dem Code 1004 beendet.</p>
  </blockquote>