Fatal error!
Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0xffffffff
libfbxsdk.dll!UnknownFunction (0x00007ffde55f11b0) + 0 bytes [UnknownFile:0]
libfbxsdk.dll!UnknownFunction (0x00007ffde55faeec) + 0 bytes [UnknownFile:0]
libfbxsdk.dll!UnknownFunction (0x00007ffde566436f) + 0 bytes [UnknownFile:0]
UE4Editor-UnrealEd.dll!UnFbx::FFbxImporter::OpenFile() (0x00007ffde7ab4a75) + 17 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\fbx\fbxmainimport.cpp:598]
UE4Editor-UnrealEd.dll!UnFbx::FFbxImporter::GetImportType() (0x00007ffde7aab91b) + 54 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\fbx\fbxmainimport.cpp:382]
UE4Editor-UnrealEd.dll!UFbxFactory::DetectImportType() (0x00007ffde7a921f4) + 11 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\fbx\fbxfactory.cpp:100]
UE4Editor-UnrealEd.dll!UFbxFactory::FactoryCreateBinary() (0x00007ffde7aa1467) + 15 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\fbx\fbxfactory.cpp:182]
UE4Editor-UnrealEd.dll!UFactory::StaticImportObject() (0x00007ffde7ac39b3) + 284 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\unrealed\private\factories\factory.cpp:288]
UE4Editor-AssetTools.dll!FAssetTools::ImportAssets() (0x00007ffde0fbceb6) + 157 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\developer\assettools\private\assettools.cpp:831]
UE4Editor-AssetTools.dll!FAssetTools::ImportAssets() (0x00007ffde0fbb637) + 32 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\developer\assettools\private\assettools.cpp:470]
UE4Editor-ContentBrowser.dll!SContentBrowser::ImportAsset() (0x00007ffddfce1c22) + 27 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\contentbrowser\private\scontentbrowser.cpp:758]
UE4Editor-ContentBrowser.dll!SContentBrowser::HandleImportClicked() (0x00007ffddfcd7168) + 22 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\editor\contentbrowser\private\scontentbrowser.cpp:749]
UE4Editor-ContentBrowser.dll!TMemberFunctionCaller::operator()<>() (0x00007ffddfb37587) + 16 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\public\delegates\delegateinstanceinterface_variadics.h:161]
UE4Editor-ContentBrowser.dll!TTupleImpl >::ApplyAfter_ExplicitReturnType >() (0x00007ffddfb3d839) + 19 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\public\delegates\tuple.h:113]
UE4Editor-ContentBrowser.dll!TBaseSPMethodDelegateInstance<0,SContentBrowser,0,FReply cdecl(void)>::Execute() (0x00007ffddfc8b429) + 36 bytes [d:\buildfarm\buildmachine++depot+ue4-releases+4.7\engine\source\runtime\core\public\delegates\delegateinstancesimpl_variadics.inl:282]
UE4Editor-Slate.dll!TBaseDelegate::Execute() (0x00007ffdeebf153a) + 6 bytes [d:\buildfarm\buildmachine++depot+ue4-releases+4.7\engine\source\runtime\core\public\delegates\delegatesignatureimpl_variadics.inl:439]
UE4Editor-Slate.dll!SButton::OnMouseButtonUp() (0x00007ffdeec1fd63) + 17 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\widgets\input\sbutton.cpp:228]
UE4Editor-Slate.dll!::operator()() (0x00007ffdeea3dd7c) + 24 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:3985]
UE4Editor-Slate.dll!FEventRouter::Route >() (0x00007ffdee9f8407) + 21 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:202]
UE4Editor-Slate.dll!FSlateApplication::ProcessMouseButtonUpEvent() (0x00007ffdeeaa4f29) + 75 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:3988]
UE4Editor-Slate.dll!FSlateApplication::OnMouseUp() (0x00007ffdeea94926) + 16 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\slate\private\framework\application\slateapplication.cpp:3949]
UE4Editor-Core.dll!FWindowsApplication::ProcessDeferredMessage() (0x00007ffdf05f3975) + 12 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsapplication.cpp:1373]
UE4Editor-Core.dll!FWindowsApplication::DeferMessage() (0x00007ffdf05e5d2e) + 74 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsapplication.cpp:1669]
UE4Editor-Core.dll!FWindowsApplication::ProcessMessage() (0x00007ffdf05f4d50) + 41 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsapplication.cpp:742]
UE4Editor-Core.dll!FWindowsApplication::AppWndProc() (0x00007ffdf05e3192) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsapplication.cpp:604]
USER32.dll!UnknownFunction (0x00007ffe1d45250d) + 0 bytes [UnknownFile:0]
USER32.dll!UnknownFunction (0x00007ffe1d452367) + 0 bytes [UnknownFile:0]
UE4Editor-Core.dll!FWindowsPlatformMisc::PumpMessages() (0x00007ffdf0693ec6) + 48 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\core\private\windows\windowsplatformmisc.cpp:774]
UE4Editor.exe!FEngineLoop::Tick() (0x00007ff7055800a9) + 8 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launchengineloop.cpp:2233]
UE4Editor.exe!GuardedMain() (0x00007ff70557267c) + 0 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\launch.cpp:142]
UE4Editor.exe!GuardedMainWrapper() (0x00007ff7055726ea) + 5 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:126]
UE4Editor.exe!WinMain() (0x00007ff705582219) + 17 bytes [d:\buildfarm\buildmachine_++depot+ue4-releases+4.7\engine\source\runtime\launch\private\windows\launchwindows.cpp:202]
UE4Editor.exe!__tmainCRTStartup() (0x00007ff705583159) + 21 bytes [f:\dd\vctools\crt\crtw32\dllstuff\crtexe.c:618]
KERNEL32.DLL!UnknownFunction (0x00007ffe1d5d13d2) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ffe1d725444) + 0 bytes [UnknownFile:0]
ntdll.dll!UnknownFunction (0x00007ffe1d725444) + 0 bytes [UnknownFile:0]
I was able to import stuff all day until the last hour now I keep getting this error.