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Fixed in 2017.1.X



Found in


Issue ID




Crash in physx::PxsBroadPhaseContextSap::batchUpdate after indeterminate time in play mode



Reproduction steps:
1. Open project attached (
2. Open scene crashtest1.
3. Press play.
4. Wait for 1-3 minutes.

Expected result: Unity will keep working.
Actual result: Unity crashes.

Notes: It might be related to object creation/destruction but it is not totally clear which kinds of objects will trigger it and which will not.

Reproduced on: 5.5.0f3, 5.5.0p4, 5.5.1p3, 5.6.0b7.
Works fine on: 5.5.0b11.
Regression introduced in: 5.5.0f1

Comments (20)

  1. cozyurt_unity

    Jul 13, 2020 17:28

    kedi ve köpek mamaları kedi kumu çeşitleri

  2. EastOfEden

    Jul 25, 2017 01:34

    Same problem.
    It is connected to disabling and enabling colliders.
    I am using it as a nasty hack to force physics to recognize that the collider is where it is after I move most of the scene to bring the player back to the origin. I will need to change it to some other method - I need a huge map.
    Anyway I am sure that this is due to me disabling and enabling the colliders.

    5.6.1f1 - this seems to be the latest version available.

  3. hvirtual

    Jun 26, 2017 14:13

    I have Unity 5.6.1p1 and QA marked the issue I submitted (Case 924500) as a duplicate of this issue.

    "YANTMAY 12, 2017 10:25
    The fix will be available with 5.6.1p1 that is out in a few days from now. Anthony." - This is not fixed for me.

  4. yant

    Jun 01, 2017 13:19

    The fix will be available in 5.5, starting 5.5.4p1. Anthony.

  5. Pickyguy

    May 30, 2017 00:46

    @Yant This issue makes our project very unstable. I can't upgrade to 5.6 right now. Because all assetbundle hashes are updated after upgrade. Every users have to re-download all assets.

  6. Pickyguy

    May 30, 2017 00:34

    @Yant Do you have any plan to apply this fix for 5.5?

  7. yant

    May 15, 2017 11:04

    @ AFRISBYMAY - please comment on the cloth-related cases directly. I need to know which ones exactly.

  8. AFrisby

    May 12, 2017 16:12

    @Yant: will those fixes also cover the other physics crashes, e.g. the ones coming reliably from cloth physics?

  9. yant

    May 12, 2017 10:25

    The fix will be available with 5.6.1p1 that is out in a few days from now. Anthony.

  10. MarkoDefiant

    Apr 28, 2017 03:42

    Since the latest round of patches (April 25 & 27) didn't include this fix here's some info that might help out anyone else that is also having this issue;

    For us using 5.5.2p2 (or 5.5.2p3) and getting rid of all negative scales on rigidbodies (and their parents) seems to be avoiding this issue. It was a combination of negative scales and reparenting (along with enabling / disabling) that seemed to be the cause of the issue for us.

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