Assertion failed: !bGenerateNonMirroredCollision

Hey guys,
So I’ve been having a problem with loading up my game, I managed to drill through the version history and located the particular asset that was causing the problem, but first, the callstack log:
Callstack

I have noticed this problem has cropped up at time to time over the last few revisions of UE4, and none of the fixes worked for me.
This would occur if I tried to load the project, or one of the sub-levels that contained the broken asset, which I’ve noticed has both been a factor in the cause of this bug.

As I’ve found the asset, I don’t need a fix (I’ve just reverted back to a prior version of the asset, and everything is fine now, but I thought I’d give you guys copies of a working and non-working version of the problem asset, hopefully you guys have the tools to analyse the uassets and see what could have been the cause.
(They both have the same name, sorry)

I have tested the broken one, if you try to drag it into a project it will just crash, tested this is 4.4.3, thought I can state that the new version 4.5 (preview), does not have this problem, so if it’s worth you guys looking at it, do so.

The assets won’t upload to the attachments, so here are dropbox links to them:

  1. Working Asset
  2. Broken Asset

Hi Vematia,

Can you post the logs from the crashed project here as well? You can find this in the filepath \UnrealProjects\PROJECTNAME\saved\logs\ . Thank you!

Hi Vernatia,

We have not heard from you in quite some time. I am marking this thread as answered for tracking purposes. If you are still experiencing this error, please comment with the requested information. Thank you!