4.14 Critical Error in save or compile

After the transition to 4.14 from 4.13, I have a lot of inconsistent engine crash when saving the BP or the scene. Then get off the default settings of my actors scene.

Attached is the last piece of the log contains an error:

Crash log:

‘/Game/Maps/TestMap_01.TestMap_01:PersistentLevel.TestMap_01’ with GeneratedClass ‘/Game/Maps/TestMap_01.TestMap_01_C’ with ClassGeneratedBy ‘/Game/Maps/TestMap_01.TestMap_01:PersistentLevel.TestMap_01’
[2017.01.11-16.48.25:317][399]LogBlueprintUserMessages: Late EndPlayMap Detection: Level ‘/Game/Maps/TestMap_01.TestMap_01:PersistentLevel’ has LevelScriptBlueprint ‘/Game/Maps/TestMap_01.TestMap_01:PersistentLevel.TestMap_01’ with GeneratedClass ‘/Game/Maps/TestMap_01.TestMap_01_C’ with ClassGeneratedBy ‘/Game/Maps/TestMap_01.TestMap_01:PersistentLevel.TestMap_01’
[2017.01.11-16.48.28:771][481]LogEditorViewport: Clicking on Actor (LMB): MOB_Chest_Test_C (MO_Chest_Test2)
[2017.01.11-16.48.32:066][591]LogSkeletalMesh: InitArticulated: Bodies already created (/Engine/Transient.DebugSkelMeshComponent_9) - call TermArticulated first.
[2017.01.11-16.48.35:949][881]Cmd: OBJ SAVEPACKAGE PACKAGE="/Game/Meshes/Iob/Act/Locked/Chest/SKM_ChestSmall_01" FILE="…/…/…/…/Projects/O3/Content/Meshes/Iob/Act/Locked/Chest/SKM_ChestSmall_01.uasset" SILENT=true
[2017.01.11-16.48.35:981][881]LogSavePackage: Save=17.53ms
[2017.01.11-16.48.35:981][881]LogSavePackage: Moving ‘…/…/…/…/Projects/O3/Saved/SKM_ChestSmall_01E1CB3F844FD4A7818B873DB65DE33615.tmp’ to ‘…/…/…/…/Projects/O3/Content/Meshes/Iob/Act/Locked/Chest/SKM_ChestSmall_01.uasset’
[2017.01.11-16.48.35:983][881]LogSavePackage:Display: Finished SavePackage …/…/…/…/Projects/O3/Content/Meshes/Iob/Act/Locked/Chest/SKM_ChestSmall_01.uasset
[2017.01.11-16.48.42:955][370]Cmd: OBJ SAVEPACKAGE PACKAGE="/Game/Entity/Instance/NPC/Human/NPC_Helper01" FILE="…/…/…/…/Projects/O3/Content/Entity/Instance/NPC/Human/NPC_Helper01.uasset" SILENT=true
[2017.01.11-16.48.43:013][370]LogSavePackage: Save=42.57ms
[2017.01.11-16.48.43:014][370]LogSavePackage: Moving ‘…/…/…/…/Projects/O3/Saved/NPC_Helper017B8C1D9B4FCB01385517D38D1230C2C8.tmp’ to ‘…/…/…/…/Projects/O3/Content/Entity/Instance/NPC/Human/NPC_Helper01.uasset’
[2017.01.11-16.48.43:016][370]LogSavePackage:Display: Finished SavePackage …/…/…/…/Projects/O3/Content/Entity/Instance/NPC/Human/NPC_Helper01.uasset
[2017.01.11-16.48.43:048][370]Cmd: OBJ SAVEPACKAGE PACKAGE="/Game/Entity/Instance/NPC/Human/NPC_Hero" FILE="…/…/…/…/Projects/O3/Content/Entity/Instance/NPC/Human/NPC_Hero.uasset" SILENT=true
[2017.01.11-16.48.43:106][370]LogSavePackage: Save=41.85ms
[2017.01.11-16.48.43:106][370]LogSavePackage: Moving ‘…/…/…/…/Projects/O3/Saved/NPC_Hero763B26A84C56F2C18B5B048918BC8003.tmp’ to ‘…/…/…/…/Projects/O3/Content/Entity/Instance/NPC/Human/NPC_Hero.uasset’
[2017.01.11-16.48.43:108][370]LogSavePackage:Display: Finished SavePackage …/…/…/…/Projects/O3/Content/Entity/Instance/NPC/Human/NPC_Hero.uasset
[2017.01.11-16.48.43:142][370]Cmd: OBJ SAVEPACKAGE PACKAGE="/Game/Entity/Prototype/pt_NPC_Human" FILE="…/…/…/…/Projects/O3/Content/Entity/Prototype/pt_NPC_Human.uasset" SILENT=true
[2017.01.11-16.48.43:309][370]LogSavePackage: Save=148.93ms
[2017.01.11-16.48.43:309][370]LogSavePackage: Moving ‘…/…/…/…/Projects/O3/Saved/pt_NPC_HumanF7187F6546CE84158CFDADB3F960B778.tmp’ to ‘…/…/…/…/Projects/O3/Content/Entity/Prototype/pt_NPC_Human.uasset’
[2017.01.11-16.48.43:311][370]LogSavePackage:Display: Finished SavePackage …/…/…/…/Projects/O3/Content/Entity/Prototype/pt_NPC_Human.uasset
[2017.01.11-16.48.43:482][370]Cmd: OBJ SAVEPACKAGE PACKAGE="/Game/Maps/TestMap_01" FILE="…/…/…/…/Projects/O3/Content/Maps/TestMap_01.umap" SILENT=true AUTOSAVING=false KEEPDIRTY=false
[2017.01.11-16.48.49:522][370]LogCrashTracker:

[2017.01.11-16.48.49:522][370]LogCrashTracker:

[2017.01.11-16.48.49:522][370]LogWindows:Error: === Critical error: ===
[2017.01.11-16.48.49:522][370]LogWindows:Error:
[2017.01.11-16.48.49:522][370]LogWindows:Error: Fatal error!
[2017.01.11-16.48.49:522][370]LogWindows:Error:
[2017.01.11-16.48.49:522][370]LogWindows:Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0xffffffff
[2017.01.11-16.48.49:522][370]LogWindows:Error:
[2017.01.11-16.48.49:522][370]LogWindows:Error: UE4Editor-CoreUObject.dll
[2017.01.11-16.48.49:523][370]LogWindows:Error: UE4Editor-CoreUObject.dll
[2017.01.11-16.48.49:523][370]LogWindows:Error: UE4Editor-CoreUObject.dll
[2017.01.11-16.48.49:523][370]LogWindows:Error: UE4Editor-CoreUObject.dll
[2017.01.11-16.48.49:523][370]LogWindows:Error: UE4Editor-CoreUObject.dll
[2017.01.11-16.48.49:523][370]LogWindows:Error: UE4Editor-CoreUObject.dll
[2017.01.11-16.48.49:523][370]LogWindows:Error: UE4Editor-UnrealEd.dll
[2017.01.11-16.48.49:523][370]LogWindows:Error: UE4Editor-UnrealEd.dll
[2017.01.11-16.48.49:523][370]LogWindows:Error: UE4Editor-UnrealEd.dll
[2017.01.11-16.48.49:523][370]LogWindows:Error: UE4Editor-UnrealEd.dll
[2017.01.11-16.48.49:523][370]LogWindows:Error: UE4Editor-UnrealEd.dll
[2017.01.11-16.48.49:523][370]LogWindows:Error: UE4Editor-UnrealEd.dll
[2017.01.11-16.48.49:523][370]LogWindows:Error: UE4Editor-Engine.dll
[2017.01.11-16.48.49:523][370]LogWindows:Error: UE4Editor-CoreUObject.dll
[2017.01.11-16.48.49:523][370]LogWindows:Error: UE4Editor-UnrealEd.dll
[2017.01.11-16.48.49:523][370]LogWindows:Error: UE4Editor-UnrealEd.dll
[2017.01.11-16.48.49:523][370]LogWindows:Error: UE4Editor-UnrealEd.dll
[2017.01.11-16.48.49:523][370]LogWindows:Error: UE4Editor-UnrealEd.dll
[2017.01.11-16.48.49:523][370]LogWindows:Error: UE4Editor-UnrealEd.dll
[2017.01.11-16.48.49:523][370]LogWindows:Error: UE4Editor-UnrealEd.dll
[2017.01.11-16.48.49:524][370]LogWindows:Error: UE4Editor-UnrealEd.dll
[2017.01.11-16.48.49:524][370]LogWindows:Error: UE4Editor-UnrealEd.dll
[2017.01.11-16.48.49:524][370]LogWindows:Error: UE4Editor-UnrealEd.dll
[2017.01.11-16.48.49:524][370]LogWindows:Error: UE4Editor-UnrealEd.dll
[2017.01.11-16.48.49:524][370]LogWindows:Error: UE4Editor-UnrealEd.dll
[2017.01.11-16.48.49:524][370]LogWindows:Error: UE4Editor-ContentBrowser.dll
[2017.01.11-16.48.49:524][370]LogWindows:Error: UE4Editor-ContentBrowser.dll
[2017.01.11-16.48.49:524][370]LogWindows:Error: UE4Editor-ContentBrowser.dll
[2017.01.11-16.48.49:524][370]LogWindows:Error: UE4Editor-ContentBrowser.dll
[2017.01.11-16.48.49:524][370]LogWindows:Error: UE4Editor-ContentBrowser.dll
[2017.01.11-16.48.49:524][370]LogWindows:Error: UE4Editor-Slate.dll
[2017.01.11-16.48.49:524][370]LogWindows:Error: UE4Editor-Slate.dll
[2017.01.11-16.48.49:524][370]LogWindows:Error: UE4Editor-Slate.dll
[2017.01.11-16.48.49:524][370]LogWindows:Error: UE4Editor-Slate.dll
[2017.01.11-16.48.49:524][370]LogWindows:Error: UE4Editor-Slate.dll
[2017.01.11-16.48.49:524][370]LogWindows:Error: UE4Editor-Slate.dll
[2017.01.11-16.48.49:525][370]LogWindows:Error: UE4Editor-Slate.dll
[2017.01.11-16.48.49:525][370]LogWindows:Error: UE4Editor-Core.dll
[2017.01.11-16.48.49:525][370]LogWindows:Error: UE4Editor-Core.dll
[2017.01.11-16.48.49:525][370]LogWindows:Error: UE4Editor-Core.dll
[2017.01.11-16.48.49:525][370]LogWindows:Error: UE4Editor-Core.dll
[2017.01.11-16.48.49:525][370]LogWindows:Error: USER32.dll
[2017.01.11-16.48.49:525][370]LogWindows:Error: USER32.dll
[2017.01.11-16.48.49:525][370]LogWindows:Error: UE4Editor-Core.dll
[2017.01.11-16.48.49:525][370]LogWindows:Error: UE4Editor.exe
[2017.01.11-16.48.49:525][370]LogWindows:Error: UE4Editor.exe
[2017.01.11-16.48.49:525][370]LogWindows:Error: UE4Editor.exe
[2017.01.11-16.48.49:525][370]LogWindows:Error: UE4Editor.exe
[2017.01.11-16.48.49:525][370]LogWindows:Error: UE4Editor.exe
[2017.01.11-16.48.49:525][370]LogWindows:Error: KERNEL32.DLL
[2017.01.11-16.48.49:525][370]LogWindows:Error: ntdll.dll
[2017.01.11-16.48.49:525][370]LogWindows:Error: ntdll.dll
[2017.01.11-16.48.49:525][370]LogWindows:Error:
[2017.01.11-16.48.49:561][370]LogExit: Executing StaticShutdownAfterError
[2017.01.11-16.48.49:587][370]LogWindows: FPlatformMisc::RequestExit(1)
[2017.01.11-16.48.49:588][370]Log file closed, 01/11/17 19:48:49