Unreal Engine 4.7 Preview

I have encountered a big on structure file in 4.7 preview6,7,8 which cause my packaging for IOS and Android failing:

MainFrameActions: Packaging (iOS): UE4Editor-Cmd: [2015.02.13-18.47.42:296] 0]LogCookCommandlet:Warning: Package /Game/SpellSystem/System/SpellStruct supposed to be fully loaded but isn’t. RF_WasLoaded is set MainFrameActions: Packaging (iOS): UE4Editor-Cmd: [2015.02.13-18.47.42:297] 0]LogCookCommandlet:Display: Cooking /Game/SpellSystem/System/SpellStruct -> E:/Unreal Projects/TopDownGame/Saved/Cooked/IOS/TopDownGame/Content/SpellSystem/System/SpellStruct.uasset MainFrameActions: Packaging (iOS): UE4Editor-Cmd: [2015.02.13-18.47.42:298] 0]LogWindows:Error: Windows GetLastError: MainFrameActions: Packaging (iOS): UE4Editor-Cmd: begin: stack for UAT

And never happens in 4.6.1 and 4.7 preview1,2,3,4.I.And I have posted in :https://answers.unrealengine/questions/171556/47-preview56-bug.html.