Can't cook game in 4.21

Development Platform & Builds
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1

Hi!

I can build all configurations except the ‘Shipping’ configuration. I use Visual Studio 2017 (Version 15.9.2).

The error is the following:

2>UnrealBuildTool : error : System.NullReferenceException: Object reference not set to an instance of an object.
2>                           at UnrealBuildTool.UEBuildBinary.<>c.<SetupBinaryLinkEnvironment>b__37_1(FileItem Item) in D:\Build\++UE4\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Configuration\UEBuildBinary.cs:line 752
2>                           at System.Linq.Enumerable.WhereSelectListIterator`2.MoveNext()
2>                           at System.Linq.Enumerable.Any[TSource](IEnumerable`1 source, Func`2 predicate)
2>                           at UnrealBuildTool.UEBuildBinary.SetupBinaryLinkEnvironment(ReadOnlyTargetRules Target, UEToolChain ToolChain, LinkEnvironment LinkEnvironment, CppCompileEnvironment CompileEnvironment, List`1 SharedPCHs, ISourceFileWorkingSet WorkingSet, DirectoryReference ExeDir, ActionGraph ActionGraph) in D:\Build\++UE4\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Configuration\UEBuildBinary.cs:line 752
2>                           at UnrealBuildTool.UEBuildBinary.Build(ReadOnlyTargetRules Target, UEToolChain ToolChain, CppCompileEnvironment CompileEnvironment, LinkEnvironment LinkEnvironment, List`1 SharedPCHs, ISourceFileWorkingSet WorkingSet, DirectoryReference ExeDir, ActionGraph ActionGraph) in D:\Build\++UE4\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Configuration\UEBuildBinary.cs:line 193
2>                           at UnrealBuildTool.UEBuildTarget.Build(BuildConfiguration BuildConfiguration, CPPHeaders Headers, List`1 OutputItems, List`1 UObjectModules, ISourceFileWorkingSet WorkingSet, ActionGraph ActionGraph, EHotReload HotReload, Boolean bIsAssemblingBuild) in D:\Build\++UE4\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Configuration\UEBuildTarget.cs:line 2193
2>                           at UnrealBuildTool.UnrealBuildTool.RunUBT(BuildConfiguration BuildConfiguration, String[] Arguments, FileReference ProjectFile, Boolean bCatchExceptions) in D:\Build\++UE4\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.cs:line 1503
2>                        (see ../Programs/UnrealBuildTool/Log.txt for full exception trace)

The log shows the following error:

ExternalExecution.ExecuteHeaderToolIfNecessary: Reflection code generated for RTSGame in 18.7816805 seconds
Log.WriteException: ==============================================================================
Log.WriteException: ERROR: System.NullReferenceException: Object reference not set to an instance of an object.
Log.WriteException:           at UnrealBuildTool.UEBuildBinary.<>c.<SetupBinaryLinkEnvironment>b__37_1(FileItem Item) in D:\Build\++UE4\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Configuration\UEBuildBinary.cs:line 752
Log.WriteException:           at System.Linq.Enumerable.WhereSelectListIterator`2.MoveNext()
Log.WriteException:           at System.Linq.Enumerable.Any[TSource](IEnumerable`1 source, Func`2 predicate)
Log.WriteException:           at UnrealBuildTool.UEBuildBinary.SetupBinaryLinkEnvironment(ReadOnlyTargetRules Target, UEToolChain ToolChain, LinkEnvironment LinkEnvironment, CppCompileEnvironment CompileEnvironment, List`1 SharedPCHs, ISourceFileWorkingSet WorkingSet, DirectoryReference ExeDir, ActionGraph ActionGraph) in D:\Build\++UE4\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Configuration\UEBuildBinary.cs:line 752
Log.WriteException:           at UnrealBuildTool.UEBuildBinary.Build(ReadOnlyTargetRules Target, UEToolChain ToolChain, CppCompileEnvironment CompileEnvironment, LinkEnvironment LinkEnvironment, List`1 SharedPCHs, ISourceFileWorkingSet WorkingSet, DirectoryReference ExeDir, ActionGraph ActionGraph) in D:\Build\++UE4\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Configuration\UEBuildBinary.cs:line 193
Log.WriteException:           at UnrealBuildTool.UEBuildTarget.Build(BuildConfiguration BuildConfiguration, CPPHeaders Headers, List`1 OutputItems, List`1 UObjectModules, ISourceFileWorkingSet WorkingSet, ActionGraph ActionGraph, EHotReload HotReload, Boolean bIsAssemblingBuild) in D:\Build\++UE4\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Configuration\UEBuildTarget.cs:line 2193
Log.WriteException:           at UnrealBuildTool.UnrealBuildTool.RunUBT(BuildConfiguration BuildConfiguration, String[] Arguments, FileReference ProjectFile, Boolean bCatchExceptions) in D:\Build\++UE4\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.cs:line 1503
Log.WriteException:        (see C:\Users\Stoffe\AppData\Roaming\Unreal Engine\AutomationTool\Logs\C+Program+Files+Epic+Games+UE_4.21\UBT-RTSGame-Win64-Shipping_2.txt for full exception trace)
Log.WriteException: 
Log.WriteException: NullReferenceException: Object reference not set to an instance of an object.
Log.WriteException:    at UnrealBuildTool.UEBuildBinary.<>c.<SetupBinaryLinkEnvironment>b__37_1(FileItem Item) in D:\Build\++UE4\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Configuration\UEBuildBinary.cs:line 752
Log.WriteException:    at System.Linq.Enumerable.WhereSelectListIterator`2.MoveNext()
Log.WriteException:    at System.Linq.Enumerable.Any[TSource](IEnumerable`1 source, Func`2 predicate)
Log.WriteException:    at UnrealBuildTool.UEBuildBinary.SetupBinaryLinkEnvironment(ReadOnlyTargetRules Target, UEToolChain ToolChain, LinkEnvironment LinkEnvironment, CppCompileEnvironment CompileEnvironment, List`1 SharedPCHs, ISourceFileWorkingSet WorkingSet, DirectoryReference ExeDir, ActionGraph ActionGraph) in D:\Build\++UE4\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Configuration\UEBuildBinary.cs:line 752
Log.WriteException:    at UnrealBuildTool.UEBuildBinary.Build(ReadOnlyTargetRules Target, UEToolChain ToolChain, CppCompileEnvironment CompileEnvironment, LinkEnvironment LinkEnvironment, List`1 SharedPCHs, ISourceFileWorkingSet WorkingSet, DirectoryReference ExeDir, ActionGraph ActionGraph) in D:\Build\++UE4\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Configuration\UEBuildBinary.cs:line 193
Log.WriteException:    at UnrealBuildTool.UEBuildTarget.Build(BuildConfiguration BuildConfiguration, CPPHeaders Headers, List`1 OutputItems, List`1 UObjectModules, ISourceFileWorkingSet WorkingSet, ActionGraph ActionGraph, EHotReload HotReload, Boolean bIsAssemblingBuild) in D:\Build\++UE4\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\Configuration\UEBuildTarget.cs:line 2193
Log.WriteException:    at UnrealBuildTool.UnrealBuildTool.RunUBT(BuildConfiguration BuildConfiguration, String[] Arguments, FileReference ProjectFile, Boolean bCatchExceptions) in D:\Build\++UE4\Sync\Engine\Saved\CsTools\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.cs:line 1503
Log.WriteException: ==============================================================================

Any ideas what may be causing this issue? This problem blocks us from upgrading to 4.21. The editor works as expected.

Thanks in advance!

2

This problem seems to be related to a plugin we used. When removed, the game cooks as expected.