Adding something to a behavior tree crashes U[4.7.6]

Development Programming & Scripting AI
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1

Hey guys,

I get a crash every time I try to drag an arrow out of something on my behavior tree.
I do not think it is a bug but I have reproduced it in every behavior tree I have.
Tried using the swarm cache clear and validate but it does not work.
Even deleted all my appdata.

Do you people have a fix ?

EDIT:

An excellent point!

well I created a new behavior tree and just dragged the arrow from root and it crashed. I use sourcetree (bitbucket) with three users in total. I started with 4.7.4 and now we are at 4.7.6, UE4 crashes as soon as I right click or end my click after I drag an arrow. I did reinstall UE4 with no avail.

I haven’t done anything else. Thanks for the help btw, hopefully we will be able to find the issue with this.

EDIT2:

To better describe the issue, when generating a context menu in a behavior tree [new or old], the engine will crash.

I have tried reinstalling, it works in a new project but I cannot migrate. I have tried it in an old version, still wont work.
I have tried the swarm fix, still wont help. I use bitbucket[sourcetree] and tried deleting my appdata memory.

EDIT3:

I’ve added a new log and sent it to you guys. Still counting on you guys :).

http://textuploader.com/xy0u

2

Hi Ladbon,

Thank for the report. Is that the full callstack from the crashreporter? Normally it the machine ID as well. Can you also post the log file from when this occurred? It can be found in your [projectname]/Saved/Logs folder.

Does the crash occur every time? Did it just start with 4.7.6? Can you right-click and add nodes, then connect them? Are you using the binary launcher build or GitHub? Just to be clear, you are saying you’ve uninstalled and reinstalled UE4 as well? Any additional information may help as well.

3

I edited my first post.

4

Thanks for updating your post with that additional information, it is helping us get an idea of what happened.

Can you also attach the log file from when this occurred? It can be found in your [projectname]/Saved/Logs folder. The crash callstack alone provides us with a direction, but the log will tell us every action leading up to the crash and much more information about the potential cause. Once i have that, I can discuss it with our AI lead developer.

Thanks!

5

Hello , here is a .rar file with the whole folder, both the dump and the log.

I tried deciffering it myself but I couldn’t.

http://www.filedropper.com/unreallogs

Lets hope this goes speedy, my development is suffering :(, good luck!

EDIT:
Any update on it?

6

Hi there, sorry about the wait. There seems to be some issue with the Filedropper site not allowing me to download from it since I do not have an account. Could you try Google Drive or a different file sharing site please? Thank you for your understanding.

7

Here we go, all shared and placed neatly there =).

8

Thank you so much for updating the post with that text. I am going to go over it with our AI lead and get back to you on what we find.

9

After reading through the log it looks like the editor is having problems with one of your blueprints for a node. It may be a Task node, but it does not say specifically what the BP is that is causing it. Basically, the BP is causing an crash when the BT tried to get it in a menu. If you can locate the BP that is causing the issue, we can take it and find out what happened and how to fix it.