Unreal Engine 4.7 Preview

Hello - I think I’ve finally figured out how to move around my UMG from preview 4 to preview 7

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Assertion failed: BlueprintObj->GeneratedClass [File:D:\BuildFarm\buildmachine_++depot+UE4-Releases+4.7\Engine\Source\Editor\UnrealEd\Private\Kismet2\Kismet2.cpp] [Line: 786]
Invalid generated class for umg_hud
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My controller has reference to widget and it is public and editable - if I make it NOT public - I get past and 4.7 preview 7 will load

Just FYI if hanging anyone else up - also I find there are some occasions where Unreal will report error in a incorrect place, ie. say line 45 breaks, it will report 46 so I spend looking in wrong place - I find null references in editor get reported like .

**edit: maybe not, its something to do in area but I haven’t quite figured it out