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[4.9] Arrays are broken in custom events

Hello folks,

So I just updated to the engine 4.9 and first issue I'm having is this

alt text

(the screen comes from a newly created project) Any variable are fine as long as they are not array. Is there something new to be aware of ?


Product Version: UE 4.9
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asked Sep 01 '15 at 02:15 PM in Bug Reports

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2 answers: sort voted first

Hi Genova,

Thanks for the report! I was able to reproduce this in 4.9.0. It looks like we have a new Note system, but I don't see any reason for this particular instance. I've created a bug report for the issue (UE-20613), and I'll let you know when I see an update on it.

In the meantime, the Note shouldn't interfere with the functionality of an array input. Please let us know if you see any additional problems with this. Thanks again!

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answered Sep 01 '15 at 05:40 PM

avatar image John Alcatraz Jan 03 '16 at 04:58 PM

Hi Ben, any update on this?

avatar image Ben Halliday STAFF Jan 03 '16 at 06:02 PM

It's marked as Fixed for 4.11, though I'm not sure yet whether it's in the Preview build. I'll be verifying the fix this afternoon, and I'll let you know =)

avatar image Ben Halliday STAFF Jan 03 '16 at 06:30 PM

Just verified this is fixed in our internal Release branch. It did not make it into the 4.11 Preview 1, but I would anticipate it being fixed in the following Preview build.

avatar image Genova Jan 03 '16 at 08:21 PM

In any case, it hasn't caused any issues as far as I can tell. It's just a note

avatar image j.m3k May 24 '16 at 04:57 AM

Hi there, it looks like it didn't make it also in he 4.11.2, didn't check in the 4.12 preview tho.

avatar image Sean L ♦♦ STAFF May 25 '16 at 07:52 PM


I've just attempted to reproduce this issue in 4.11.2, and did not experience the Note appearing on the Custom Event node.

Here were the steps I followed:

  • Create a new blueprint

  • Add a custom event

  • Add an input of any type

  • Make the input an array

  • Compile the blueprint

Doing this, no note appeared on the node. What steps are you following when you are seeing the note appear?

avatar image Dinfael Aug 27 '16 at 11:45 AM

Well, I have the same issue (blue note, etc.), although it does not show on custom events inside a graph, but it appears on an interface event. I have my main character calling an interface function, this function's input is an array made of a specific Actor bp. Then I use this function as an event into my GUI (umg) and the note appears on that event.

See image :

alt text

EDIT :: I forgot to mention that moments ago it was working fine, but when I did another manipulation (not connected to this thing) the note appeared after I compiled again ...

avatar image Sean L ♦♦ STAFF Aug 29 '16 at 06:08 PM

As this post is quite old, would you mind creating a new post for this in the Bug Reports section of Answerhub. Please provide a detailed list of steps we can follow to reproduce this in a clean project.

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I just want to add for anyone else that stumbled upon this issue, that by saving all and restarting the editor, I was able to remove the note. Interestingly, I had an old custom event that I added an array input to, and it worked fine. I then made a new custom event, added an array, and that's when that note appeared. That's what led me to believe that restarting the editor would help, because I know from other issues that restarting can help all your blueprints recompile and have clean communication, and the new custom event may not be communicating with everything cleanly yet.

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answered Nov 02 '18 at 11:03 PM

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