I can also swap the effects on the fly.

What do you mean by “when I force the DLL”?

Here’s some additional information that might be important:
I created the basic effects in Max and then imported them into HISE via RNBO. I then combined these effects further in a ScriptNode network. I compiled this network and loaded it into a HardcodedFX.

This confirms what I see, so the main difference is that you load your hardcoded DLLs dynamically.
I doubt the setAttribute is the origin of the problem because when I force the DLL it then works.
I need sample accuracy so the targetId is what I want.

Now, when you say "I load the HardcodedFX dynamically via script", do you mean once at init or on preset load CB? (or other behaviour to swap them on the fly)

The UI element has a matrixTargetId, and I’m using HISE’s modulation system.

I load the HardcodedFX dynamically via script. I haven’t added the module states to the preset. Just the Global Modulator Container.

So it’s possible that it works for me because I control the parameters via setAttribute and the UI elements aren’t directly linked to the effect parameters. But that’s just a guess.

If it helps and you're really stuck, I'd be happy to send you my project without the effects DLLs and C++ files....

When setting the hardcoded DLL to "" then back to the original one, the connection is made.
So why it's not connecting at init I don't know...

@Oli-Ullmann Do you set your networks/DLL from script or are they just set in the module tree like I do?

Perhaps I should also add those module states to the presets?

Do you mean you actually have an FX plugin working with the matrix modulation system? (extra_mod nodes, UI matrixTargetId, etc...)

Additionally, I have the following in the extra definitions:
HISE_ENABLE_MIDI_LEARN=1
Otherwise, you won’t be able to access the context menu for the buttons. And just to be safe, I also checked the box for Enable Midi Input FX in the settings.

I think that might solve your problem.

/*
In the case the modulation is deleted when loading a DAW project, do this:
Engine.addModuleStateToUserPreset("Global Modulator Container");
https://forum.hise.audio/topic/14137/modulation-is-deleted-when-loading-a-daw-project/5
*/

Thanks anyway!

@Christoph-Hart Yes

Engine.addModuleStateToUserPreset(“Your Global Modulator Container Name”)

I don't remember 100% for sure, but I think I had the same issues as you. Adding the Global Modulator Container to the preset solved all the problems.