I am getting error when building a file for Windows Universal 8.1

Target Platforms Desktop
1

IOException: Sharing violation on path Temp\StagingArea\Horse Racing.WindowsPhone\TempSerializationWeaver\UnityEngine.dll
System.IO.File.Move (System.String sourceFileName, System.String destFileName) (at /Users/builduser/buildslave/mono/build/mcs/class/corlib/System.IO/File.cs:339)
PostProcessWinRT.RunSerializationWeaver () (at C:/buildslave/unity/build/PlatformDependent/WinRT/SharedSources/CSharp/PostProcessWinRT.cs:448)
PostProcessUniversal81.RunSerializationWeaver () (at C:/buildslave/unity/build/PlatformDependent/MetroPlayer/Extensions/Managed/PostProcessUniversal81.cs:83)
PostProcessWinRT.Process () (at C:/buildslave/unity/build/PlatformDependent/WinRT/SharedSources/CSharp/PostProcessWinRT.cs:123)
PostProcessUniversal81.Process () (at C:/buildslave/unity/build/PlatformDependent/MetroPlayer/Extensions/Managed/PostProcessUniversal81.cs:42)
UnityEditor.Metro.BuildPostprocessor.PostProcess (BuildPostProcessArgs args) (at C:/buildslave/unity/build/PlatformDependent/MetroPlayer/Extensions/Managed/ExtensionModule.cs:133)
UnityEditor.PostprocessBuildPlayer.Postprocess (BuildTarget target, System.String installPath, System.String companyName, System.String productName, Int32 width, Int32 height, System.String downloadWebplayerUrl, System.String manualDownloadWebplayerUrl, BuildOptions options, UnityEditor.RuntimeClassRegistry usedClassRegistry) (at C:/buildslave/unity/build/Editor/Mono/BuildPipeline/PostprocessBuildPlayer.cs:316)
UnityEditor.HostView:OnGUI()

*What should i do to get rid of this problem so that file can be build.

2

The error indicates that the same file is used by multiple processes at the same time.
Usually this is:

  • App is already running and you try to overwrite it → close the app first, then build
  • Antivirus software → disable antivirus or setup and exclude on that directory
  • Sometimes Visual Studio locks files when indexing stuff. These are rare. Closing VS before building would help.