Add variable to structure make crash

Development Programming & Scripting
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Hi !

I actually have a strange problem …

I work with BluePrint and i have a structure, which is …

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Today, i’d like to add a variable, which is an other structure :slight_smile:

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This one. So, i just added the variable like this :

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And when i saved and launch my game to check, i got all my BluePrint ‘failed to compile’…
Some of BP has

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some variable which disappear…

Thanks to me, i saved my work on GitHub and i can backup my project but i’ve tried multiple times and i don’t understand why it’s happening :frowning:

Thanks to everyone which answer me !

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I find UE is very finickey around structures.

When you first change the structure, you’ll get an update warning, bottom right

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for all the other BP items that use this structure. I’d click it and save, then exit.

It should be ok when you restart the editor. But I have found that changing structures and just carrying on will lead to a crash.

Good that you backed up :wink:

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Hi !

Thanks for your answer, and rapid answer !

So, just tried but all my BP broke again :frowning:

Same problem :frowning:

Does i have to save one file by one file ?

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I’ve seen when i add a variable which is not a custom structure, following your trick, it’s work without any problems … But when change it to my custom structure that broke :rofl:

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Yes, it can’t handle nested structures, apparently… :frowning:

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Oh ! I’ve found a solution, strange solution :rofl:

So … Modify structure, add the new structure :

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Now, save ONLY the structure

Close UnrealEngine, discard any other BP changes

Re-Open UE5 and that’s work :neutral_face:

Don’t understand, but it’s ok :rofl:

So thanks for your answer ! and your answer time, i appreciate a lot ! :slight_smile:

Have a nice day

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Or that! :smiley:

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Thanks you : i thought i had lost 10 days of work because of this bug . I hope they will resolve this .

Edit : for me its inconsistant the first time it worked , then tried on another struct and this problems happened despite not saving others actors .

So it force me to roll back on ue4 and loosing 10 days of works :frowning: