Undo in blueprints crashes a lot

anonymous_user_a0598449 · September 28, 2015, 5:52am

With 4.9 I’ve become quite scared of undoing anything without saving beforehand. Sadly I am unable to reproduce most of crashes except for one.

Create a blank project
Add a Character or Player Controller blueprint
Add a new function
Click compile
Press ctrl+z

anonymous_user_33800a51 · September 28, 2015, 9:33pm

Hi ,

I haven’t been able to reproduce any crash with these repro steps. Please reproduce crash following these steps, and copy information in Crash Reporter window, including Machine ID, and paste it here. Make sure you hit Send. Then logs from project’s \Saved\Logs folder and attach them here. Thanks!

ANTONIOPS · September 28, 2015, 11:54pm

Hi, I think I found problem, try these steps:

Launch Unreal Engine 4.9.1
Create a new project using a blueprint template (I used Side Scroller).
Edit character blueprint and add a boolean variable.
Compile.
Ctrl+z.
Crash.

Edit: Logs

Logs

anonymous_user_a0598449 · September 29, 2015, 1:02am

I could reproduce this on 2 systems with binary version 4.9.1.
But it doesn’t seem to occur with current 4.9.2 git build so i guess it has already been fixed.

Edit:
Crash report

Seems to be related to

anonymous_user_b9532c9a · September 29, 2015, 1:55pm

HI everyone,

I attempted steps above but produced no crash while attempting them. Are there any other steps that can be added to reproduce this on my end? If you could, please follow 's steps above to send us callstack and logs. Additionally, please upload your dxdiag here so we can take a look.

anonymous_user_b9532c9a · September 29, 2015, 5:29pm

Hi ANTONIOPS,

Thank you for logs and dxdiag. Are you currently using beta AMD drivers for your GPU? If so, try rolling back to a released driver and see if that addresses error. If not, do you have an asset this has happened with I can look at?

anonymous_user_b9532c9a · September 30, 2015, 3:00pm

Hi ,

This looks like it may have been addressed in 4.9.2 hotfix, can you update to 4.9.2 and see if this occurs for you still?

ANTONIOPS · September 30, 2015, 5:01pm

Hi, I updated to 4.9.2 and now It doesn’t crash so I think my problem is solved, but I don’t know if it is for OP.

Thanks

anonymous_user_a0598449 · September 30, 2015, 7:48pm

Yes thank you, it seems to be stable now like in source version.

anonymous_user_b9532c9a · September 30, 2015, 9:17pm

Hi ,

I’m happy to hear this is no longer occurring for you. I will mark this as answered for tracking purposes.