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Mobile fbx problem


since 4.8, if you import a fbx model from 3DS Max in your Mobile Game Project, the game crash on Mobile. Testet with HTC One and Samsung S5.

Product Version: UE 4.8
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asked Jun 21 '15 at 08:29 PM in Bug Reports

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3 answers: sort voted first


UE-29826 has been entered for this issue found. Thank you for reporting the reproduction steps. If you have any further questions, please let us know.


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answered Apr 22 '16 at 04:06 PM

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Open your imported mesh in Mesh editor and check vertex count. If your mesh have over 65K vertex, try to reduce vertex count in 3DS MAX and import it again and do test on mobile devices.

65K is limitation for Mobile system


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answered Jun 22 '15 at 12:00 PM

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avatar image pandagraphy Jun 22 '15 at 12:02 PM

hello, its just a simple little box

avatar image svv3dUDN Jun 22 '15 at 12:33 PM

Have you tried to create a project from a template (FPS or TPS), and then packaging it and deploy to Mobile?

And check also android API in SDK for your devices. For S5 you need add Android API21. And in UE4 in Project Setting in Platforms->Android SDK set NDK API Level latest or android-21, because in default android-19.

Maybe it help you.

avatar image pandagraphy Jun 23 '15 at 05:13 AM

Test it with Template. It only helps to restart the Engine if the Launcher crash the game on mobile. after restart, it works a while.

avatar image Samantha Sutton ♦♦ STAFF Aug 26 '15 at 04:14 PM

Hey Pandagraphy,

Are you still having trouble with deploying to mobile devices? If so, which version of the engine are you using and what version of Android is your device updated to?


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I can comfirm I'm seeing the exact same issue. Exported a wide variety of ways. Simple cubes as its still crashing mobile but deploying the mobile preview just fine.

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answered Apr 11 '16 at 05:11 AM

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avatar image Samantha Sutton ♦♦ STAFF Apr 13 '16 at 09:25 PM

Hey Tenacity,

Which version of the engine are you working in? Are you on a source or binary build of the engine? What are your exact reproduction steps to achieve this crash?

Also, I need for you to provide me the logs from your mobile device.

  • Attach your phone to the computer

  • Go here: C:\NVPACK\android-sdk-windows\tools

  • Open up Monitor.bat

  • Launch the program and save the logs

If you cannot get Monitor.bat to open, please go to:

  • C:\NVPACK\android-sdk-windows\tools\lib\monitor-x86

  • Open up Monitor.exe

  • Follow the instructions above

Make sure that you highlight all of the logs, because they do not save unless they're highlighted.

Thank you!

avatar image Tenacity Apr 14 '16 at 08:14 PM

Hi Samantha, Thanks for getting back to me. Current Version is 4.11.1 and my version is binary coming directly from the Epic Launcher without any mods to source.

I have tested this issue on iphone 5 and 6. I don't have android so I won't be able to provide the logs you requested above.

I have pin pointed the exact cause as well.
1. Open Editor and import fbx (Successfully)
2. Deploy to mobile 3. Launch Deploy it crashes.


If you follow these steps then everything works as intended. 1. Open the editor

  1. Import FBX (Successfully)

  2. Close Editor

  3. Reload Editor

  4. Deploy to Mobile

  5. Everything Working As Intended.

So it seems like you have to just leave the engine after an FBX import then Deploying your mobile package corrects this issue.

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