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Repro steps for External Reference errors in UMG (Bug Report)

  1. Create widget with named slot.

  2. Nest that widget inside another widget, save and compile.

  3. Assign a widget to the named slot inside the nested widget, save and compile.

  4. return to the original widget that was nested.

  5. Delete the slot you assigned to in superwidget, save and compile.

  6. Attempt to save in superwidget. Now you will get a "reference in external package" in "Engine/Transient" and the asset will fail to save.

I have been struggling for two days now to construct a widget because I have had to go back and rework some low level subwidgets and then could not save the superwidget. Is there a workaround?

Product Version: UE 4.7
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asked May 18 '15 at 06:25 PM in Bug Reports

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What happens if you delete what you assigned to the slot before deleting the named slot first?

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answered May 19 '15 at 02:55 PM

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Nick Darnell ♦♦ STAFF
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avatar image Rudy Q ♦♦ STAFF May 19 '15 at 07:18 PM

Hello Bennick,

I was unable to reproduce this issue on our end following the steps provided. I have a few quick 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 a clean project?

  2. If so, are there any steps that may have been left out of your original post?

  3. Could you let me know if Nick's workaround works for you?

avatar image Bennick May 19 '15 at 09:55 PM

You're right... I'm unable to reproduce the bug in a clean project. I will test that workaround, which I imagine should work, but now I'm getting a larger problem.

In the superwidget, I am suddenly seeing that it is recreating slots in subwidgets that were deleted out a long time ago. Even when I go back to the subwidget and recompile that and the superwidget, save, then restart the editor, it resurrects these weird old versions that don't even exist anymore. Why could this be happening?

avatar image Rudy Q ♦♦ STAFF May 20 '15 at 12:15 PM

Hello Bennick,

Could you create a new thread for your second issue? This is for tracking purposes. If you could you just answer the following questions in the new thread and post a link in a reply I will be more than happy to assist you further.

Quick questions for new thread:

  1. Is the new problem occurring in the clean project or the project that was giving you issue originally?

  2. If not a clean project, could you try and reproduce it in one?

  3. Could you provide a detailed list of steps (like those from your original report)?

  4. Could you provide screen shots of the issue to help clarify what it is that you are seeing?

Make it a great day

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