Package Fails when Nativizeing BP's

I can’t work out what’s tripping it up, packaged fine without nativizeing. Any help on this issue would be great but also any tips for finding issues responsible for package failure in the future as the error and warning filters in the output log don’t seem to work well for package issues. Thanks. Ivy

UAT_Log

Cook.txt

UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.26:172][ 0]LogRedirectors:Display: Timer ResolveTimeLoad 6.678806
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.26:172][ 0]LogRedirectors:Display: Timer ResolveTimeDelegate 0.000000
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.26:172][ 0]LogRedirectors:Display: Timer ResolveTimeTotal 6.688877
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.27:275][ 0]LogK2Compiler:Warning: AccessInaccessiblePropertyUsingOffset - NOEXPORT structure should be handled in a custom way: /Script/CoreUObject.Vector4
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.27:276][ 0]LogK2Compiler:Warning: AccessInaccessiblePropertyUsingOffset - NOEXPORT structure should be handled in a custom way: /Script/CoreUObject.Vector4
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.27:276][ 0]LogK2Compiler:Warning: AccessInaccessiblePropertyUsingOffset - NOEXPORT structure should be handled in a custom way: /Script/CoreUObject.Vector4
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.27:277][ 0]LogK2Compiler:Warning: AccessInaccessiblePropertyUsingOffset - NOEXPORT structure should be handled in a custom way: /Script/CoreUObject.Vector4
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.27:277][ 0]LogK2Compiler:Warning: AccessInaccessiblePropertyUsingOffset - NOEXPORT structure should be handled in a custom way: /Script/CoreUObject.Vector4
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:438][ 0]LogWindows:Error: begin: stack for UAT
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:438][ 0]LogWindows:Error: === Critical error: ===
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:438][ 0]LogWindows:Error:
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:438][ 0]LogWindows:Error: Fatal error!
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:438][ 0]LogWindows:Error:
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:438][ 0]LogWindows:Error: Unhandled Exception: EXCEPTION_ACCESS_VIOLATION reading address 0x00000298
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:438][ 0]LogWindows:Error:
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:438][ 0]LogWindows:Error: UE4Editor-Engine.dll!0x00000000D8D08999
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:438][ 0]LogWindows:Error: UE4Editor-BlueprintCompilerCppBackend.dll!0x00000000D2018167
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:439][ 0]LogWindows:Error: UE4Editor-BlueprintCompilerCppBackend.dll!0x00000000D20186D2
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:439][ 0]LogWindows:Error: UE4Editor-BlueprintCompilerCppBackend.dll!0x00000000D200B836
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:439][ 0]LogWindows:Error: UE4Editor-BlueprintCompilerCppBackend.dll!0x00000000D200927F
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:439][ 0]LogWindows:Error: UE4Editor-KismetCompiler.dll!0x00000000D2929E39
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:440][ 0]LogWindows:Error: UE4Editor-KismetCompiler.dll!0x00000000D292C2C6
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:440][ 0]LogWindows:Error: UE4Editor-KismetCompiler.dll!0x00000000D292B94D
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:441][ 0]LogWindows:Error: UE4Editor-BlueprintNativeCodeGen.dll!0x00000000D20B5538
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:441][ 0]LogWindows:Error: UE4Editor-BlueprintNativeCodeGen.dll!0x00000000D20B80F7
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:441][ 0]LogWindows:Error: UE4Editor-BlueprintNativeCodeGen.dll!0x00000000D20B5EAA
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:441][ 0]LogWindows:Error: UE4Editor-UnrealEd.dll!0x00000000D53B83E8
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:441][ 0]LogWindows:Error: UE4Editor-UnrealEd.dll!0x00000000D541C3A2
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:441][ 0]LogWindows:Error: UE4Editor-UnrealEd.dll!0x00000000D52E045D
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:441][ 0]LogWindows:Error: UE4Editor-UnrealEd.dll!0x00000000D52D3BF2
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:441][ 0]LogWindows:Error: UE4Editor-Cmd.exe!0x000000003F43776F
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:441][ 0]LogWindows:Error: UE4Editor-Cmd.exe!0x000000003F42E96A
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:442][ 0]LogWindows:Error: UE4Editor-Cmd.exe!0x000000003F42EBBA
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:442][ 0]LogWindows:Error: UE4Editor-Cmd.exe!0x000000003F440A29
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:442][ 0]LogWindows:Error: UE4Editor-Cmd.exe!0x000000003F4416FE
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:442][ 0]LogWindows:Error: kernel32.dll!0x0000000076F559CD
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:442][ 0]LogWindows:Error: ntdll.dll!0x000000007708A561
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:442][ 0]LogWindows:Error: ntdll.dll!0x000000007708A561
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:442][ 0]LogWindows:Error:
UATHelper: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2017.02.20-13.59.31:442][ 0]LogWindows:Error: end: stack for UAT
UATHelper: Packaging (Windows (64-bit)): CommandUtils.Run: Run: Took 74.5022613s to run UE4Editor-Cmd.exe, ExitCode=3
UATHelper: Packaging (Windows (64-bit)): Project.Cook: Cook failed. Deleting cooked data.
UATHelper: Packaging (Windows (64-bit)): Program.Main: ERROR: AutomationTool terminated with exception: AutomationTool.AutomationException: Cook failed. —> AutomationTool.AutomationException: BUILD FAILED: Failed while running Cook for C:\PestControl\Data\PestControl 4.15\PestControl.uproject; see log C:\Users\Finn\AppData\Roaming\Unreal Engine\AutomationT
ool\Logs\C+Program+Files+Epic+Games+UE_4.15\Cook-2017.02.20-13.59.52.txt
UATHelper: Packaging (Windows (64-bit)): at AutomationTool.CommandUtils.RunCommandlet(FileReference ProjectName, String UE4Exe, String Commandlet, String Parameters)
UATHelper: Packaging (Windows (64-bit)): at AutomationTool.CommandUtils.CookCommandlet(FileReference ProjectName, String UE4Exe, String[] Maps, String[] Dirs, String InternationalizationPreset, String[] CulturesToCook, String TargetPlatform, String Parameters)
UATHelper: Packaging (Windows (64-bit)): at Project.Cook(ProjectParams Params)
UATHelper: Packaging (Windows (64-bit)): — End of inner exception stack trace —
UATHelper: Packaging (Windows (64-bit)): at Project.Cook(ProjectParams Params)
UATHelper: Packaging (Windows (64-bit)): at BuildCookRun.DoBuildCookRun(ProjectParams Params)
UATHelper: Packaging (Windows (64-bit)): at BuildCookRun.ExecuteBuild()