Can't call blueprint function that is defined in another game module (C++)

Development Programming & Scripting C++
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1

Hi,

in blueprint, I’m trying to call the function, which is defined in the UBlueprintFunctionLibrary in another game module. Unfortunately, I can’t find the function node in blueprint’s context menu. I’ve added BlueprintCallable tag to the function definition.

My project structure in solution explorer looks like this:

  • Source
    • TheGame
      • TheGame.Build.cs
      • TheGame.cpp
      • TheGame.h
    • TheOtherModule
      • TheOtherModule.Build.cs
      • BlueprintFunctionLib.h
      • BlueprintFunctionLib.cpp
    • TheGame.Target.cs
    • TheGameEditor.Target.cs

I’ve added the reference to TheOtherModule to the *.Target.cs files:
ExtraModuleNames.AddRange( new string[] { "TheGame", "TheOtherModule" } );

Also, I added TheOtherModule as one of the TheGame private dependency:
PrivateDependencyModuleNames.AddRange(new string[] { "TheOtherModule" });

Everything compiles, but nothing works as expected. I tried to remove Intermediate, DerivedDataCache and Build directories, and nothing. Still I can’t call the blueprint function from the blueprint.

Can anyone please help me? I’m stuck and have no idea what I’m doing wrong. Thanks in advance!

2

You’re missing TheOtherModule.cpp file that implements the module and registers it with Unreal. Check out all the steps to creating a new module here: ari.games - Modules

1 Like
3

Indeed, I needed to call IMPLEMENT_MODULE macro and then register it in *.uproject file. Thank you!

4

I expected to call IMPLEMENT_MODULE large scale and afterward register it in *.uproject document. Much thanks to you.