Error building Player: Exception: Failed to run Serialization weaver with cmdline "Temp/StagingArea\Data/Managed/Plugins/Metro\WinControls.dll" -pdb -verbose -unity-engine="Temp/StagingArea\Managed/UnityEngine.dll" "Temp/StagingArea\TempSerializationWeaver".[Temp/StagingArea\Data/Managed/Plugins/Metro\WinControls.dll]
Symbols will be read from Temp/StagingArea\Managed/UnityEngine.pdb
Weaving assembly C:\PROJECTS\ABG-4.6.1 - WindowsPhone - New\Temp\StagingArea\Data\Managed\Plugins\Metro\WinControls.dll
Symbols will be read from Temp/StagingArea\Data/Managed/Plugins/Metro\WinControls.pdb
Microsoft.Cci.Pdb.PdbDebugException: Unknown custom metadata item kind: 7
   at Microsoft.Cci.Pdb.PdbFunction.ReadCustomMetadata(BitAccess bits)
   at Microsoft.Cci.Pdb.PdbFunction..ctor(ManProcSym proc, BitAccess bits)
   at Microsoft.Cci.Pdb.PdbFunction.LoadManagedFunctions(BitAccess bits, UInt32 limit, Boolean readStrings)
   at Microsoft.Cci.Pdb.PdbFile.LoadFuncsFromDbiModule(BitAccess bits, DbiModuleInfo info, IntHashTable names, ArrayList funcList, Boolean readStrings, MsfDirectory dir, Dictionary`2 nameIndex, PdbReader reader)
   at Microsoft.Cci.Pdb.PdbFile.LoadFunctions(Stream read, Dictionary`2& tokenToSourceMapping, String& sourceServerData, Int32& age, Guid& guid)
   at Mono.Cecil.Pdb.PdbReader.PopulateFunctions()
   at Mono.Cecil.Pdb.PdbReader.ProcessDebugHeader(ImageDebugDirectory directory, Byte[] header)
   at Mono.Cecil.ModuleDefinition.ProcessDebugHeader()
   at Mono.Cecil.ModuleReader.ReadSymbols(ModuleDefinition module, ReaderParameters parameters)
   at Mono.Cecil.ModuleReader.CreateModuleFrom(Image image, ReaderParameters parameters)
   at Mono.Cecil.ModuleDefinition.ReadModule(String fileName, ReaderParameters parameters)
   at usw.Weaver.WeaveAssembly(String assemblyPath, AssemblyDefinition unityEngineAssemblyDefinition)
   at usw.Weaver.Weave()
   at usw.Program.RunProgram(ConversionOptions options)
   at usw.Program.Main(String[] args)