UFUNCTION macro causes compile errors

Development Programming & Scripting
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1

Hey! Still new here. I’ve seen other questions with similar problems but they don’t’ seem to fix my issue.

In my header file, this works

	UFUNCTION(BlueprintCallable, Category = "VR PlayFab Actor")
	void OnPlayFabError(FString Result);

this also works

	void OnPlayFabError(FJsonObject Result);

This doesn’t work…

	UFUNCTION(BlueprintCallable, Category = "VR PlayFab Actor")
	void OnPlayFabError(FJsonObject Result);

I get the error:
" Error: Unable to find ‘class’, ‘delegate’, ‘enum’, or ‘struct’ with name ‘FJsonObject’"

I don’t understand why the UFUNCTION would cause it to not be able to find a class. Any ideas? THanks

2

FJsonObject is not supported in Blueprints, so you can’t use it in a UFUNCTION

3

Interesting. What makes it not compatible with blueprints?

4

image

It’s missing a USTRUCT macro, so it’s not made public to Unreal Engine’s reflection system.