[4.6.1] UMG Widget inside widget bug

So, i have updated to 4.6.1 and one UMG bug has appeared.

I have UMG Widget, that has another widgets inside it, but after i updated my UE, this error began to appear at start.

Error Failed import for ObjectProperty /Game/Blueprints/Inventory/Int_InventoryWidget.Int_InventoryWidget_C:Int_Details_C_106

There is Int_Details inside Int_Inventory and now it doesn’t work whenever I load the project. To fix it, i have to delete Details panel from my widget and setup it again. But after another project load i get the same thing and has to setup it again :frowning:

In gameplay it works fine. Oh… And when I select this widget, i get weird name on Details panel:


Any ideas? :frowning: It happens with some widgets, other do works fine… I will try to make Details widget from scratch and see if it helps.

Here is the video:

Oh… Look like I found the reason of this problem.

It appears when i make a variable in Int_Details with type of my parent(Int_InventoryWidget) or UserWidget and Cast to my parent(Int_InventoryWidget).

Hello ,

I see that you seemed to have found an answer to your issue. Do you still require any assistance with this problem?

Well, I do… I need to get a variable from Int_InventoryWidget to Int_Details. But as I mentioned earlier, engine starts doing weird stuff(Check the video)… Im not sure, if this is a bug, but that’s not ok. Sometimes it even crashes, when i try to select this widget(Int_Details).

Hello ,

After watching the video, I see that you get some compile errors. Can you provide those so that I may have a look at them?

Hello ,

We have not heard back from you in a few days, so we are marking this post as Resolved for tracking purposes. If you are still experiencing the issue you reported, please respond to this message with additional information and we will offer further assistance.

Thank you.

This exact same bug still exists in 4.8.3.

A widget added inside a widget works fine until you close and reopen the editor, then the widget is corrupted as described above.

In my case, following the Twitch Training stream on UMG drag and drop, part 1, the ActionBar widget placed in the HUD widget gets corrupted on reopen of the editor.

Hmm, that is very weird. I do not have anything like that now. Does your widget have reference to its parent (main widget, where it is located)?

My widget is a direct copy of the widget created in the UE Twitch training stream, so my assumption is that it all the blueprint nodes and settings are correct.

And, in fact, the widget works fine and as specified until I close the editor and reload, then the widget is corrupted. If I place two widgets of the same kind inside a widget, only the first widget is corrupted.

Hello Rhynedahll,

I have a few questions for you that will help narrow down what issue it is that you are experiencing.

Quick questions:

  1. Can you reproduce this issue in clean project?
  2. If so, could you provide a detailed set of steps to reproduce this issue on our end?
  3. Could you provide screen shots of any blueprints that may be involved with this issue?

I will work on this this evening and report back.

I am also downloading 4.9 and will try my project in the new version to see if the problem persists.

One fact I forgot to add was that my project was created originally with 4.7.6 and upgraded to 4.8

Hello Rhynedahll,

Thanks for the additional information. I will take that into account when looking over the reproduction steps.

  1. No. A new project created in 4.8.3 reloads without the problem.
  2. N/A
    3.I am doing testing to try to discover the exact point of failure and if I discover which step is fatal, I will post screenshots.

Hello Rhynedahll,

Would it be possible to get a zipped down simplified version of the project that you are having issues with?

Sure, as long as you promise not to laugh. :slight_smile:

I’m just a hobbyist.

By simplified, I presume that you mean stripped of art assets?

Hello Rhynedahll,

I will do my best to contain my mirth. As for what I meant about simplified, I simply meant that if you could remove parts of your project that do not deal with the issue it would make it easier to track down the cause.

My project is a kitchen sink project. (12+ gig mostly art assets)

I started paring it down this morning and had almost finished when the “Rebuilding class hierarchy” bug on the Player Controller occurred. I did not delete the controller, the editor just lost track of it somehow (Shows “None”) and now I cannot set it in Maps and Modes without crashing the editor.

I am convinced at this stage that the project does not save assets properly. Deleting in the editor does not always work and sometimes it only appears to work while leaving the folders in place. This would explain why the widget w/in a widget stops working after reload. Apparently some parameters are not being saved.

If I get it to work, I’ll upload a copy. If not, I’ll try again at some point during the weekend.

My current plan is to simply migrate the necessary assets to a new project in 4.9. and start over from scratch.

Hello Rhynedahll,

If you are able to upload a version of the project or if you are able to reproduce this issue in a clean project please feel free to update this thread

Make it a great day