How to change Particle Trail in Anim Notify with Blueprint?

Development Programming & Scripting
2

@L1z4rD89 or anyone.

  1. What am I doing wrong with this BPI?

    BPI which input or outputs
    BPI which input or outputs874×841 73 KB

    Widget BP code - particle variable and BPI
    Widget BP code - particle variable and BPI1377×528 171 KB

  2. Without a tutorial I am unclear what to set an Input and Output (at BPI creator window), or what to put as the Target (when using the BPI message Node)?
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  3. Do I need to use a ‘Set Variable node’ after a BPI message node? Or does BPI pass the Input variable > to whatever the Power Output Pin (white) is connected to?
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  4. Is Target = the Variable? Or are only “Inputs” variables (which I add at the BPI management window)? (Im unclear what to do when the Target is also the Variable that I want to pass)

  5. Why is this Variable read-only, when I made it and checked boxes?

    Trail Notify BP code - goal for Particle variable 2
    Trail Notify BP code - goal for Particle variable 21679×839 311 KB

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@TheKaosSpectrum Why? 2020: were you speaking of an older version limitation?
Is it because C++ limitation, cant expose the variable in BP?
Why would Epic give us a selectable setting (Particle), yet not give us a way to change it live in Game using BP - when they know we want to Get/Set everything?

Without knowing your reason, it’s frustrating because Epic gave us a way to add the Override BP (our version of Trail Notify). But it’s not working as shown above. And Idk if there’s a hardcode restriction or if my nodes are wrong??? Please help, ty.