UE4 package failed, and the last prompt is “error unknown cook failure”

What’s the reason? Look up the error from the beginning of the log. The suspicious errors found at the beginning are as follows:

MainFrameActions: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2016.05.27-13.42.02:613][  0] LogCook:Display : Cooking /Engine/Functions/Engine_ MaterialFunctions02/Texturing/ScreenAlignedPixelToPixelUVs -> E:/work/Viba/trunk/UnrealEngine-4.10/ShooterGame/Saved/Cooked/WindowsNoEditor/Engine/Content/Functions/Engine_ MaterialFunctions02/Texturing/ScreenAl ignedPixelToPixelUVs.uasset
MainFrameActions: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2016.05.27-13.42.02:615][  0]LogSa vePackage:Display : Finished SavePackage E:/work/Viba/trunk/UnrealEngine-4.10/ShooterGame/Saved/Cooked/WindowsNoEditor/Engine/Content/Functions/Engine_ MaterialFunctions02/Texturing/ScreenAl ignedPixelToPixelUVs.uasset
MainFrameActions: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2016.05.27-13.42.02:616][  0] LogLinker:Warning : Unable to load package (../../../ShooterGame/Content/RestrictedAssets/PhysicalMaterials/PhysMat_ Metal.uasset ) PackageVersion 493, MaxExpected 482 : LicenseePackageVersion 0, MaxExpected 0.
MainFrameActions: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2016.05.27-13.42.02:616][  0]Co okResults:Warning : Warning Package /Game/RestrictedAssets/PhysicalMaterials/PhysMat_ Metal supposed to be fully loaded but isn’t. RF_ WasLoaded is not set
MainFrameActions: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2016.05.27-13.42.02:617][  0] LogCook:Warning : Package /Game/RestrictedAssets/PhysicalMaterials/PhysMat_ Metal supposed to be fully loaded but isn’t. RF_ WasLoaded is not set
MainFrameActions: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2016.05.27-13.42.02:617][  0] LogCook:Display : Cooking /Game/RestrictedAssets/PhysicalMaterials/PhysMat_ Metal -> E:/work/Viba/trunk/UnrealEngine-4.10/ShooterGame/Saved/Cooked/WindowsNoEditor/ShooterGame/Content/RestrictedAssets/PhysicalMaterials/PhysMat_ Metal.uasset
Packagi ngResults:Warning : Warning Warning Package /Game/RestrictedAssets/PhysicalMaterials/PhysMat_ Metal supposed to be fully loaded but isn’t. RF_ WasLoaded is not set
MainFrameActions: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2016.05.27-13.42.02:617][  0]L ogWindows:Error : Windows GetLastError: operation completed successfully. (0)
MainFrameActions: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2016.05.27-13.45.13:425][  0]LogOut putDevice:Error : 
MainFrameActions: Packaging (Windows (64-bit)): UE4Editor-Cmd: begin: stack for UAT
MainFrameActions: Packaging (Windows (64-bit)): UE4Editor-Cmd: [2016.05.27-13.45.13:425][  0]L ogWindows:Error : === Critical error: ===
MainFrameActions: Packaging (Windows (64-bit)): UE4Editor-Cmd: 
MainFrameActions: Packaging (Windows (64-bit)): UE4Editor-Cmd: Fatal error!
MainFrameActions: Packaging (Windows (64-bit)): UE4Editor-Cmd: 
MainFrameActions: Packaging (Windows (64-bit)): UE4Editor-Cmd: 
MainFrameActions: Packaging (Windows (64-bit)): UE4Editor-Cmd: 
MainFrameActions: Packaging (Windows (64-bit)): UE4Editor-Cmd: KERNELBASE.dll
MainFrameActions: Packaging (Windows (64-bit)): UE4Editor-Cmd: 
MainFrameActions: Packaging (Windows (64-bit)): UE4Editor-Cmd: UE4Editor- Core.dll !FOutputDeviceWindowsError::Serialize() [e:\work\viba\trunk\unrealengine-4.

The fatal error in the red letter doesn’t explain the specific reason. Continue to look up and see that “the operation is completed successfully”. Don’t be confused by this. Continue to look up and find that one is just packing output, but packing it to the file physmat_ Metal stops, continues the file, and finds that the file can’t be seen in the editor, but exists in the folder. The original file has been covered by an error. Just restore it to the previous version.

In some cases, one of the above knowledge may be the problem of cook, such as the following example:

MainFrameActions: ´ò°ü (Windows (64λ)): UE4Editor-Cmd: [2016.11.25-07.42.11:776][  0]LogOut putDevice:Error : 
MainFrameActions: ´ò°ü (Windows (64λ)): UE4Editor-Cmd: begin: stack for UAT
MainFrameActions: ´ò°ü (Windows (64λ)): UE4Editor-Cmd: [2016.11.25-07.42.11:776][  0]L ogWindows:Error : === Critical error: ===
MainFrameActions: ´ò°ü (Windows (64λ)): UE4Editor-Cmd: 
MainFrameActions: ´ò°ü (Windows (64λ)): UE4Editor-Cmd: Fatal error!
MainFrameActions: ´ò°ü (Windows (64λ)): UE4Editor-Cmd: 
MainFrameActions: ´ò°ü (Windows (64λ)): UE4Editor-Cmd: 
MainFrameActions: ´ò°ü (Windows (64λ)): UE4Editor-Cmd: 
MainFrameActions: ´ò°ü (Windows (64λ)): UE4Editor-Cmd: 
MainFrameActions: ´ò°ü (Windows (64λ)): UE4Editor-Cmd: 
MainFrameActions: ´ò°ü (Windows (64λ)): UE4Editor-Cmd: 
MainFrameActions: ´ò°ü (Windows (64λ)): UE4Editor-Cmd: [2016.11.25-07.42.11:777][  0]LogOut putDevice:Error : 
MainFrameActions: ´ò°ü (Windows (64λ)): UE4Editor-Cmd: end: stack for UAT
MainFrameActions: ´ò°ü (Windows (64λ)): UE4Editor-Cmd: [2016.11.25-07.42.13:768][  0]L ogShaders:Display : Finished batch of 10 jobs in 3.173s, TShadowDepthVSForGSVertexShadowDepth_ OutputDepthfalse Instructions = 100, TShadowDepthVSVertexShadowDepth_ OutputDepthfalse Instructions = 100, TShadowDepthVSForGSVertexShadowDepth_ PerspectiveCorrectfalse Instructions = 9
8, TShadowDepthVSVertexShadowDepth_ PerspectiveCorrectfalse Instructions = 98, FOnePassPointShadowProjectionGS Instructions = 64, FHitProxyPS Instructions = 72, FHitProxyVS Instructions = 93, TLightMapDensityPSFNoLightMapPolicy Instructions = 98, TLightMapDensityVSFNoLightMapPolicy Instructions = 93, FDepthOnlyPS Instructions = 72
MainFrameActions: ´ò°ü (Windows (64λ)): UE4Editor-Cmd: [2016.11.25-07.42.13:769][  0]L ogShaders:Display : Finished batch of 10 jobs in 2.885s, DepthNoPixelPipeline, FVertexDensityPS Instructions = 87, FVertexDensityGS Instructions = 55, FVertexDensityVS Instructions = 66, FVelocityPS Instructions
MainFrameActions: ´ò°ü (Windows (64λ)):  = 78, FVelocityVS Instructions = 103, TShadowDepthPSPixelShadowDepth_ OnePassPointLightfalse Instructions = 67, TShadowDepthPSPixelShadowDepth_ PerspectiveCorrectfalse Instructions = 68, TShadowDepthPSPixelShadowDepth_ NonPerspectiveCorrectfalse Instructions = 67, TShadowDepthVSForGSVertexShadowDepth_ OnePassPointLightfalse
 Instructions = 65
MainFrameActions: ´ò°ü (Windows (64λ)): CommandUtils.Run : Run: Took 719.6181598s to run UE4Editor- Cmd.exe , ExitCode=3
MainFrameActions: ´ò°ü (Windows (64λ)): Project.Cook : Cook failed. Deleting cooked data.
MainFrameActions: ´ò°ü (Windows (64λ)): Program.Main : ERROR: AutomationTool terminated with exception: AutomationTool.AutomationException : Cook failed. —> AutomationTool.AutomationException : BUILD FAILED: Failed while running Cook for E:\Work\FPS\UnrealEngine-VXGI-4.12\ShooterGame\ShooterGame.
MainFrameActions: ´ò°ü (Windows (64λ)): uproject; see log E:\Work\FPS\UnrealEngine-VXGI-4.12\Engine\Programs\AutomationTool\Saved\Logs\Cook-2016.11.25-15.44.05.txt
MainFrameActions: ´ò°ü (Windows (64λ)):    ÔÚ AutomationTool.CommandUtils.RunCommandlet (FileReference ProjectName, String UE4Exe, String Commandlet, String Parameters) λÖà E:\Work\FPS\UnrealEngine-VXGI-4.12\Engine\Source\Programs\AutomationTool\AutomationUtils\ CommandletUtils.cs :ÐкŠ359
MainFrameActions: ´ò°ü (Windows (64λ)):    ÔÚ Project.Cook (ProjectParams Params) λÖà e:\Work\FPS\UnrealEngine-VXGI-4.12\Engine\Source\Programs\AutomationTool\Scripts\ CookCommand.Automation.cs :ÐкŠ24
MainFrameActions: ´ò°ü (Windows (64λ)):    — ÄÚ²¿Òì³£¶ÑÕ»¸ú×ٵĽáβ —
MainFrameActions: ´ò°ü (Windows (64λ)):    ÔÚ Project.Cook (ProjectParams Params) λÖà e:\Work\FPS\UnrealEngine-VXGI-4.12\Engine\Source\Programs\AutomationTool\Scripts\ CookCommand.Automation.cs :ÐкŠ262
MainFrameActions: ´ò°ü (Windows (64λ)):    ÔÚ BuildCookRun.DoBuildCookRun (ProjectParams Params) λÖà e:\Work\FPS\UnrealEngine-VXGI-4.12\Engine\Source\Programs\AutomationTool\Scripts\ BuildCookRun.Automation.cs :ÐкŠ212
MainFrameActions: ´ò°ü (Windows (64λ)):    ÔÚ AutomationTool.BuildCommand.Execute () λÖà E:\Work\FPS\UnrealEngine-VXGI-4.12\Engine\Source\Programs\AutomationTool\AutomationUtils\ BuildCommand.cs :ÐкŠ28
MainFrameActions: ´ò°ü (Windows (64λ)):    ÔÚ AutomationTool.Automation.Execute (List`1 CommandsToExecute, CaselessDictionary`1 Commands) λÖà E:\Work\FPS\UnrealEngine-VXGI-4.12\Engine\Source\Programs\AutomationTool\AutomationUtils\ Automation.cs :ÐкŠ538
MainFrameActions: ´ò°ü (Windows (64λ)):    ÔÚ AutomationTool.Automation.Process (String[] CommandLine) λÖà E:\Work\FPS\UnrealEngine-VXGI-4.12\Engine\Source\Programs\AutomationTool\AutomationUtils\ Automation.cs :ÐкŠ509
MainFrameActions: ´ò°ü (Windows (64λ)):    ÔÚ AutomationTool.Program.MainProc (Object Param) λÖà E:\Work\FPS\UnrealEngine-VXGI-4.12\Engine\Source\Programs\AutomationTool\ Program.cs :ÐкŠ131
MainFrameActions: ´ò°ü (Windows (64λ)):    ÔÚ AutomationTool.InternalUtils.RunSingleInstance (Func`2 Main, Object Param) λÖà E:\Work\FPS\UnrealEngine-VXGI-4.12\Engine\Source\Programs\AutomationTool\AutomationUtils\ Utils.cs :ÐкŠ704
MainFrameActions: ´ò°ü (Windows (64λ)):    ÔÚ AutomationTool.Program.Main () λÖà E:\Work\FPS\UnrealEngine-VXGI-4.12\Engine\Source\Programs\AutomationTool\ Program.cs :ÐкŠ54
MainFrameActions: ´ò°ü (Windows (64λ)): Program.Main : AutomationTool exiting with ExitCode=25 (Error_ UnknownCookFailure)
MainFrameActions: ´ò°ü (Windows (64λ)): Domain_ ProcessExit
MainFrameActions: ´ò°ü (Windows (64λ)): AutomationToolLauncher exiting with ExitCode=25
MainFrameActions: ´ò°ü (Windows (64λ)): copying UAT log files…
MainFrameActions: ´ò°ü (Windows (64λ)): BUILD FAILED
Packagi ngResults:Error : ´íÎó Unknown Cook Failure

Pay attention to the part marked red in the log. You need to go to the log file cook-2016.11.25-15.44.05.txt to check the original contents of the specific cook

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