What happened to the "Show Message Dialog" Node?

[corekid96 (Dannyyy)]

The Problem:
I’ve set up a Widget Caching system which basically checks if a Widget has “loaded” in successfully. Now I wanted to display an error message, in case it somehow failed but obviously I can’t just set up a custom Modal Widget if loading the Widgets failed in the first place.

Expected Solution:
Usually game engines offer a way to open a native system message dialog for cases like these and I came across this doc but it doesn’t seem to exist anymore in UE 5.4.2? (Another way would be to force a crash but UE seems to be the only game engine on the market that doesn’t offer this feature either.)

Any elegant Blueprint based solutions would be much appreciated!

[3dRaven]

What is stopping you from spawning a widget and adding it to the screen?
If the engine is running in a good enough state to print to screen then it probably has the slate module to show UMG.

Or you could code something up in slate to make it lighter than UMG

This might also give you some ideas

Modal dialog box from C++

First of all UMG is just a wrapper for Slate… and even Slate does not have such feature at its core, as it does not come with predefined window control system… or rether it does not enforce that on you. But there is 2 features in engine that can fulfill this functionality but they may not satisfy you: First one is editor implementation of message box… problem is this is editor only But if you do any editor extension it is worth to know it and you should use this in that case,…

[corekid96 (Dannyyy)]

I’m not familiar with the Engine internals. Would the game crash if the Slate Module somehow failed to run in a shipping build?

If that’s the case then I honestly wouldn’t do any manual error checks at all. It’s my only concern that the player would “get stuck” without an UI while the game is still running.

[3dRaven]

Ok so I looked into how the engine handles the messages
A simple example

FMessageDialog::Open(EAppMsgType::Ok, FText::FromString("Error"), FText::FromString("Error title"));

There are also confirm / cancels but they are more complex.
I’ll do a packing test with it.

Edit: Can confirm it works in packed shipping. It pops up as a native message box.

Can’t capture the shipped version as it steals focus from the windows capture and is in fullscreen.