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(BUG) Automatic Crash On Reimport/Import Mesh 4.5.1

Description: editor will crash/freeze when importing or reimporting a static mesh.

Severity: Break (cannot import any static meshes).

Frequency : All the time.

Steps to reproduce:

  1. Drag FBX file to content browser or right click --> import.

  2. Leave default options.

  3. Click import or import all.

  4. Will load up to 97% and stop. Editor will instantly freeze

View crash logs and dxdiag below. I can send the FBX through email.

Thanks !

Crash Logs DxDiag

Product Version: Not Selected
crashlogs.txt (6.5 kB)
dxdiag.txt (36.6 kB)
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asked Nov 02 '14 at 10:24 AM in Bug Reports

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118 5 9 12

avatar image SuperDuperYeah Nov 02 '14 at 06:05 PM

Forgot to mention. That's in 4.5.1.

avatar image SuperDuperYeah Nov 02 '14 at 07:28 PM

Tried it today after restarting. Still automatically crashes. I can't get any work done.

avatar image AndrewHurley Nov 03 '14 at 07:53 PM

Hello SuperDuperYeah,

I have attempted to reproduce your crash multiple times with different meshes, but with no luck. One question is how large or how many polys/verts are on the mesh you are attempting to import?

avatar image SuperDuperYeah Nov 03 '14 at 07:59 PM

Hello Andrew ! Can I send you the mesh I was trying to import/reimport (it's a very simple model) via email ? It says "This attachment is not permitted because the file type is invalid."

avatar image AndrewHurley Nov 03 '14 at 10:59 PM

Of course! You can zip it up in a folder and submit it that way. If it is too larger then we suggest using dropbox instead and you can provide us with a link.

avatar image SuperDuperYeah Nov 04 '14 at 12:25 AM

Hey Andrew here's the model !

I continued to test with the model and did a general "merge" in Maya. Imported it and it worked. I'm just highly curious why this model would instantly crash UE4 on clicking import (open faces ? Zero length vertices ?). There's definitely something that UE4 doesn't like in it.

[TestModel][1] [1]: /storage/temp/19935-testmodel.zip

testmodel.zip (16.1 kB)
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Hello again SuperDuperYeah,

So I attempted to import the model you linked and I was indeed not able to import it. I pulled the mesh into Max and deleted the verts on the back of your mesh that seem to be extra. See image as reference:

alt text

Re-export your mesh being sure turbosmooth option is unchecked in the export options.

Importing your mesh should work instantly now. What was happening is that the engine was attempting to map those verts and was getting caught in an endless loop. I hope this helped!

Andrew Hurley

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answered Nov 04 '14 at 02:37 PM

avatar image AndrewHurley Nov 04 '14 at 04:09 PM

Because you were getting a consistent crash we would like to submit a bug report for your issue. Did you submit your crash report when you experienced the crash or did you just copy the callstack?

I ask because in our crash log database I cannot locate your crash, so if you could reproduce your crash and submit a report we can go ahead and move forward with bugging your issue.

avatar image SuperDuperYeah Nov 04 '14 at 11:24 PM

Alright ! I'm doing it right now. I posted many crash reports (above 10). I'll do it again.

avatar image SuperDuperYeah Nov 04 '14 at 11:27 PM

I just sent a crash report ! Hope this will help you stabilizing this awesome engine :).

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