Packaging Export for VIVE_ERROR

Hello,
I’m working to a very complex and wide architectural scene to create a VR for HTC VIVE.
I decide to use an EVERMOTION Vol01 as a base to pick up materials and furniture objects and then I imported that model in FBX format.
After that I worked a lot on it for materials, light, grass and furniture I made some test for lighting building and it was taking a reasonably render time (around 10 mins).
I set up the VR game mode based on the following tutorial:

Problems started to come out at the moment for packaging for windows 64bit>>>>>>>>>>>

First: Unreal asked me to instal VISUAL STUDIO 2015
Second: Once visual studio has been installed, THE PACKAGING PROCESS STOPS FEW SECONDS after starting the packaging process.
Third: I made a test to import in a plain unreal project and if I import the whole FBX model, same problem as before for packaging.
Forth: I’m doing a test now, importing the model excluding the busiest mesh (like the landscape terrain mesh) and is packaging alright but I havent create the VR game mode and pawn blueprint.

Now, do you have any idea where the problem might be???
should I have to restart a new scene from a scratch or there is an easy way to migrate the whole existing scene to a new plain (and hopefully not corrupted scene)???

Please let me know if you need more info!
Thanks a lot for your help!

Just for the records, in the following lines you can see the output log till when it stops the packaging process:

UATHelper: Packaging (Windows (64-bit)): Running AutomationTool…
UATHelper: Packaging (Windows (64-bit)): Automation.ParseCommandLine: Parsing command line: -ScriptsForProject=“//3dfile/aam_3d_project/16264_Lamerwood/02 Model/Unreal/16264_Lamerwood/Lamerwood_16264.uproject” BuildCookRun -nocompile -nocompileeditor -installed -nop4 -project=“//3dfile/aam_3d_project/16264_Lamerwood/02 Model/Unreal/16264_Lamerwood/Lamerwood_
16264.uproject” -cook -stage -archive -archivedirectory=C:/Users/mpaffi/Desktop/Lamerwood -package -clientconfig=Shipping -ue4exe=UE4Editor-Cmd.exe -clean -prereqs -targetplatform=Win64 -build -CrashReporter -utf8output
UATHelper: Packaging (Windows (64-bit)): Automation.Process: Setting up command environment.
UATHelper: Packaging (Windows (64-bit)): BuildCookRun.SetupParams: Setting up ProjectParams for \3dfile\aam_3d_project\16264_Lamerwood\02 Model\Unreal\16264_Lamerwood\Lamerwood_16264.uproject
UATHelper: Packaging (Windows (64-bit)): Project.Build: ********** BUILD COMMAND STARTED **********
UATHelper: Packaging (Windows (64-bit)): CommandUtils.Run: Run: C:\Program Files\Epic Games\UE_4.15\Engine\Binaries\DotNET\UnrealBuildTool.exe Lamerwood_16264 Win64 Shipping -Project=“\3dfile\aam_3d_project\16264_Lamerwood\02 Model\Unreal\16264_Lamerwood\Lamerwood_16264.uproject” -clean “\3dfile\aam_3d_project\16264_Lamerwood\02 Model\Unreal\16264_Lamerwoo
d\Lamerwood_16264.uproject” -remoteini=“\3dfile\aam_3d_project\16264_Lamerwood\02 Model\Unreal\16264_Lamerwood” -nobuilduht -NoHotReload
UATHelper: Packaging (Windows (64-bit)): UnrealBuildTool: ERROR: System.UnauthorizedAccessException: Access to the path ‘C:\Program Files\Epic Games\UE_4.15\Engine\Intermediate\Build\LastBuiltTargets.txt’ is denied.
UATHelper: Packaging (Windows (64-bit)): UnrealBuildTool: at System.IO.__Error.WinIOError(Int32 errorCode, String maybeFullPath)
UATHelper: Packaging (Windows (64-bit)): UnrealBuildTool: at System.IO.FileStream.Init(String path, FileMode mode, FileAccess access, Int32 rights, Boolean useRights, FileShare share, Int32 bufferSize, FileOptions options, SECURITY_ATTRIBUTES secAttrs, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)
UATHelper: Packaging (Windows (64-bit)): UnrealBuildTool: at System.IO.FileStream…ctor(String path, FileMode mode, FileAccess access, FileShare share, Int32 bufferSize, FileOptions options, String msgPath, Boolean bFromProxy, Boolean useLongPath, Boolean checkHost)
UATHelper: Packaging (Windows (64-bit)): UnrealBuildTool: at System.IO.StreamWriter.CreateFile(String path, Boolean append, Boolean checkHost)
UATHelper: Packaging (Windows (64-bit)): UnrealBuildTool: at System.IO.StreamWriter…ctor(String path, Boolean append, Encoding encoding, Int32 bufferSize, Boolean checkHost)
UATHelper: Packaging (Windows (64-bit)): UnrealBuildTool: at System.IO.File.InternalWriteAllText(String path, String contents, Encoding encoding, Boolean checkHost)
UATHelper: Packaging (Windows (64-bit)): UnrealBuildTool: at UnrealBuildTool.UnrealBuildTool.RunUBT(String] Arguments, FileReference ProjectFile)
UATHelper: Packaging (Windows (64-bit)): CommandUtils.Run: Run: Took 0.227s to run UnrealBuildTool.exe, ExitCode=5
UATHelper: Packaging (Windows (64-bit)): Program.Main: ERROR: AutomationTool terminated with exception: AutomationTool.CommandUtils+CommandFailedException: Command failed (Result:5): C:\Program Files\Epic Games\UE_4.15\Engine\Binaries\DotNET\UnrealBuildTool.exe Lamerwood_16264 Win64 Shipping -Project=“\3dfile\aam_3d_project\16264_Lamerwood\02 Model\Unreal\1
6264_Lamerwood\Lamerwood_16264.uproject” -clean “\3dfile\aam_3d_project\16264_Lamerwood\02 Model\Unreal\16264_Lamerwood\Lamerwood_16264.uproject” -remoteini=“\3dfile\aam_3d_project\16264_Lamerwood\02 Model\Unreal\16264_Lamerwood” -nobuilduht -NoHotReload. See logfile for details: ‘UnrealBuildTool-2017.06.02-17.41.02.txt’
UATHelper: Packaging (Windows (64-bit)): at AutomationTool.CommandUtils.RunAndLog(String App, String CommandLine, String Logfile, Int32 MaxSuccessCode, String Input, ERunOptions Options, Dictionary2 EnvVars, SpewFilterCallbackType SpewFilterCallback) UATHelper: Packaging (Windows (64-bit)): at AutomationTool.CommandUtils.RunAndLog(CommandEnvironment Env, String App, String CommandLine, String LogName, Int32 MaxSuccessCode, String Input, ERunOptions Options, Dictionary2 EnvVars, SpewFilterCallbackType SpewFilterCallback)
UATHelper: Packaging (Windows (64-bit)): at AutomationTool.CommandUtils.RunUBT(CommandEnvironment Env, String UBTExecutable, String CommandLine, String LogName, Dictionary2 EnvVars) UATHelper: Packaging (Windows (64-bit)): at AutomationTool.CommandUtils.RunUBT(CommandEnvironment Env, String UBTExecutable, FileReference Project, String Target, String Platform, String Config, String AdditionalArgs, String LogName, Dictionary2 EnvVars)
UATHelper: Packaging (Windows (64-bit)): at AutomationTool.UE4Build.CleanWithUBT(String TargetName, UnrealTargetPlatform Platform, String Config, FileReference UprojectPath, Boolean ForceMonolithic, Boolean ForceNonUnity, Boolean ForceDebugInfo, String InAddArgs, Boolean ForceUnity, Dictionary2 EnvVars) UATHelper: Packaging (Windows (64-bit)): at AutomationTool.UE4Build.Build(BuildAgenda Agenda, Nullable1 InDeleteBuildProducts, Boolean InUpdateVersionFiles, Boolean InForceNoXGE, Boolean InUseParallelExecutor, Boolean InForceNonUnity, Boolean InForceUnity, Boolean InShowProgress, Dictionary2 PlatformEnvVars, Nullable1 InChangelistNumberOverride, Dictio
nary2 InTargetToManifest) UATHelper: Packaging (Windows (64-bit)): at Project.Build(BuildCommand Command, ProjectParams Params, Int32 WorkingCL, ProjectBuildTargets TargetMask) UATHelper: Packaging (Windows (64-bit)): at BuildCookRun.DoBuildCookRun(ProjectParams Params) UATHelper: Packaging (Windows (64-bit)): at BuildCookRun.ExecuteBuild() UATHelper: Packaging (Windows (64-bit)): at AutomationTool.BuildCommand.Execute() UATHelper: Packaging (Windows (64-bit)): at AutomationTool.Automation.Execute(List1 CommandsToExecute, CaselessDictionary1 Commands) UATHelper: Packaging (Windows (64-bit)): at AutomationTool.Automation.Process(String] Arguments) UATHelper: Packaging (Windows (64-bit)): at AutomationTool.Program.MainProc(Object Param) UATHelper: Packaging (Windows (64-bit)): at AutomationTool.InternalUtils.RunSingleInstance(Func2 Main, Object Param)
UATHelper: Packaging (Windows (64-bit)): at AutomationTool.Program.Main()
UATHelper: Packaging (Windows (64-bit)): Program.Main: AutomationTool exiting with ExitCode=5 (5)
UATHelper: Packaging (Windows (64-bit)): BUILD FAILED
PackagingResults:Error: Error Unknown Error

“UATHelper: Packaging (Windows (64-bit)): UnrealBuildTool: ERROR: System.UnauthorizedAccessException: Access to the path ‘C:\Program Files\Epic Games\UE_4.15\Engine\Intermediate\Build\LastBuiltTargets.txt’ is denied.”

Do you have the engine locked by source control? It looks like you don’t have read/write access to it.

Well…can be right!
the IT system is quite wide here so we have many elements locked.
I will ask to the IT guys and i will let you know!

Best