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Fixed in 2019.2.X

Fixed in 2017.4.X, 2018.3.X, 2019.1.X



Found in



Issue ID




"Sub-emitters must be children of the system that spawns them" error is shown even though sub-emitters are correctly parented



How to reproduce:
1. Open "EmitterIssue" project and "test stage 1..." scene
2. Enter playmode and pause it
3. Observe "Sub-emitters must be children of the system that spawns them" error appearing
4. Double click on the error in the console, it highlights "Debris" GameObject that has two sub-emitters "DebrisSmoke" and "DerisFire" that are correctly parented under "Debris" GameObject

Expected result: Error should not be shown, since "DebrisSmoke" and "DerisFire" sub-emitters are correctly parented under "Debris" GameObject as required in 5.6+ versions

Regression introduced in - 2017.2.0b1
Reproducible with - 2017.3.0a7, 2017.2.0b11, 2017.2.0b1
Not reproducible with - 2017.1.0p2, 2017.2.0a4

Note - Deleting some of the "MediumExplosionFX" prefabs, fixes the issue

  1. Response avatar


    Jan 25, 2019

    We are currently testing a fix for this issue.

Comments (13)

  1. A14dc2647da3c5d4c3afe01e3adc4199?d=mm


    Aug 30, 2020 12:36

    still have in 2019.4.8ft

  2. 6c858306c74eb9b7a1e4bb63a668525b?d=mm


    May 11, 2020 15:47

    Still have it in 2019.3.9f1

  3. Ddf7cbb7b852458e91af77debc529824?d=mm


    Mar 11, 2019 20:22

    Still happening in 2017.4.22f1 LTS version

  4. E6c2a001ac895cecc83894b3f4ed45da?d=mm


    Nov 15, 2018 08:03

    Only device occurs. unity 2018.2.4f1

  5. 8313946210e4e6c05a927cb2a88ac193?d=mm


    Nov 02, 2018 09:38

    This error is occurring in Unity 2018.2.11f1 too.

  6. 20307e94c0cdb27db3154516863ab757?d=mm


    Sep 17, 2018 15:29

    Also occurs on 2017.4.6f1

  7. D06440e257ba27d2424cc0bc617f3f15?d=mm


    Aug 21, 2018 21:00

    Its happening to me too!! :\
    ITs been a year and its happening on 2018.2.0f2

  8. 454c2c8712092f552bf57e275934b704?d=mm


    Aug 19, 2018 17:01

    I also have in 2017.3.1f1, even on the standard assets fireworks! Seems to be intermittent though, occasionally they fire off fine.

  9. D4b06d78069fca3f00ca1c29c322b2f3?d=mm


    Aug 03, 2018 04:11

    Problem still exists in Unity 2018.2.1f1, it appears to also cause a nasty memory leak. Again when this happens if you click on one of the parent particle systems in the scene and then go under subemitters and click the linked gameobject in the field it will highlight the child emitters location in the scene hierarchy and you can see it will be under the wrong parent and not the expected parent. So somehow they are being jumbled and assigned the wrong parent, this only happens when they are instantiated through code. If you drag them in as prefabs they maintain their correct relationship.

  10. Fd4377ab80a8e5f207d2b403533eb28c?d=mm


    Jul 20, 2018 14:02

    I am seeing this issue on 2017.3.1.f1 Personal... It started happening today after I opened up my project. No changes had been made, so I can't give you any helpful steps to reproduce it. It doesn't seem to break anything though, just has an error message.

    It it highlighting a regular scene object and the sub-emitters are clearly child objects of the system. Hope that helps.

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