Hi,
I created a c++ plugin in UE5.4.3 VS2022 with dependency on another local/project plugin under the same project as follows:
TestProject
-Plugins
-A
-B
Where B depends on A, ie in B.build.cs, I included plugin A in the PrivateDependencyModuleNames as follows:
PrivateDependencyModuleNames.AddRange(
new string[]
{
...,
"A",
}
);
The project compiled without any error in VS2022 and tested successfully in Unreal Editor. However, when I tried to package plugin B in Unreal Editor under Edit->Plugins and selecting plugin B under the Project section → Package, it failed with the following:
Could not find definition for module 'PluginA', (referenced via Target -> PluginB.Build.cs)
CompilationResultException: Could not find definition for module 'PluginA', (referenced via Target -> PluginB.Build.cs)
at UnrealBuildTool.RulesAssembly.CreateModuleRules(String ModuleName, ReadOnlyTargetRules Target, String ReferenceChain, ILogger Logger) in D:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\System\RulesAssembly.cs:line 441
at UnrealBuildTool.RulesAssembly.CreateModuleRules(String ModuleName, ReadOnlyTargetRules Target, String ReferenceChain, ILogger Logger) in D:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\System\RulesAssembly.cs:line 437
at UnrealBuildTool.RulesAssembly.CreateModuleRules(String ModuleName, ReadOnlyTargetRules Target, String ReferenceChain, ILogger Logger) in D:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\System\RulesAssembly.cs:line 437
at UnrealBuildTool.RulesAssembly.CreateModuleRules(String ModuleName, ReadOnlyTargetRules Target, String ReferenceChain, ILogger Logger) in D:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\System\RulesAssembly.cs:line 437
at UnrealBuildTool.RulesAssembly.CreateModuleRules(String ModuleName, ReadOnlyTargetRules Target, String ReferenceChain, ILogger Logger) in D:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\System\RulesAssembly.cs:line 437
at UnrealBuildTool.UEBuildTarget.CreateModuleRulesAndSetDefaults(String ModuleName, String ReferenceChain, ILogger Logger) in D:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\Configuration\UEBuildTarget.cs:line 5339
at UnrealBuildTool.UEBuildTarget.FindOrCreateModuleByName(String ModuleName, String ReferenceChain, ILogger Logger) in D:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\Configuration\UEBuildTarget.cs:line 5463
at UnrealBuildTool.UEBuildTarget.<>c__DisplayClass71_0.<PreBuildSetup>b__0(String Name, String RefChain) in D:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\Configuration\UEBuildTarget.cs:line 3384
at UnrealBuildTool.UEBuildModule.RecursivelyCreateModulesByName(List`1 ModuleNames, List`1& Modules, Boolean& bDependsOnVerse, CreateModuleDelegate CreateModule, String ReferenceChain, List`1 ReferenceStack, ILogger Logger) in D:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\Configuration\UEBuildModule.cs:line 1274
at UnrealBuildTool.UEBuildModule.RecursivelyCreateModules(CreateModuleDelegate CreateModule, String ReferenceChain, List`1 ReferenceStack, ILogger Logger) in D:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\Configuration\UEBuildModule.cs:line 1137
at UnrealBuildTool.UEBuildBinary.CreateAllDependentModules(CreateModuleDelegate CreateModule, ILogger Logger) in D:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\Configuration\UEBuildBinary.cs:line 162
at UnrealBuildTool.UEBuildTarget.PreBuildSetup(ILogger Logger) in D:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\Configuration\UEBuildTarget.cs:line 3382
at UnrealBuildTool.UEBuildTarget.Create(TargetDescriptor Descriptor, Boolean bSkipRulesCompile, Boolean bForceRulesCompile, Boolean bUsePrecompiled, UnrealIntermediateEnvironment IntermediateEnvironment, ILogger Logger) in D:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\Configuration\UEBuildTarget.cs:line 1392
at UnrealBuildTool.UEBuildTarget.Create(TargetDescriptor Descriptor, BuildConfiguration BuildConfiguration, ILogger Logger) in D:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\Configuration\UEBuildTarget.cs:line 1226
at UnrealBuildTool.BuildMode.CreateMakefileAsync(BuildConfiguration BuildConfiguration, TargetDescriptor TargetDescriptor, ISourceFileWorkingSet WorkingSet, ILogger Logger) in D:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\Modes\BuildMode.cs:line 1114
at UnrealBuildTool.BuildMode.BuildAsync(List`1 TargetDescriptors, BuildConfiguration BuildConfiguration, ISourceFileWorkingSet WorkingSet, BuildOptions Options, FileReference WriteOutdatedActionsFile, ILogger Logger, Boolean bSkipPreBuildTargets) in D:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\Modes\BuildMode.cs:line 396
at UnrealBuildTool.BuildMode.ExecuteAsync(CommandLineArguments Arguments, ILogger Logger) in D:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\Modes\BuildMode.cs:line 252
at UnrealBuildTool.UnrealBuildTool.Main(String[] ArgumentsArray) in D:\Program Files\Epic Games\UE_5.4\Engine\Source\Programs\UnrealBuildTool\UnrealBuildTool.cs:line 660
WriteFileIfChanged() wrote 0 changed files of 0 requested writes.
I’ve tested a few different scenarios, I even created 2 independent simple plugins A & B where B does not rely on A and each can be packaged successfully on their own but as soon as I included A in B.build.cs, B will faile to package with the same error. I have searched and read through several related posts in and outside of the forum but couldn’t find an answer. Please help…