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Fixed in 2018.3

Fixed in 5.5, 5.6, 2017.1, 2017.2, 2018.1, 2018.2

Votes

334

Found in

5.6.0b5

2017.1.0f3

Issue ID

873467

Regression

Yes

Unity throws out Fatal Error: Callback registration failed kMaxCallback

Themes

-

Unity throws out Fatal Error: "Callback registration failed kMaxCallback" after working with the project for 30 minutes or more. It appears randomly.

Steps:
1. Actively use Unity for more than 30 minutes

Actual: Unity continues to work
Result: Unity crashes with Fatal Error.

Reproducible with: 2017.1.4f1, 2017.2.3p1, 2017.4.4f1, 2018.1.3f1, 2018.2.0b6

Note:
Reproduced on macOS, Windows, Linux.
Bug Report window does not appear.
Scene files are not restored after reopening Unity so all not saved Scenes are lost.

  1. Response avatar

    karl_jones

    Jan 04, 2019

    Please file a new bug report If you are still encountering this problem. The error message is a symptom and can be caused by many different areas. The area for this bug has been fixed.

Comments (201)

  1. 3043f86fe0bad2231747488033fb6aa0?d=mm

    yelizyyy

    Sep 09, 2017 12:13

    it occurs every 30 mins. I use Unity 2017.1.1f1. It is a very annoying bug, why don't you fix it?

  2. 9a2fd59f9b15d8b790a5446d5ce08cec?d=mm

    Lepascal

    Sep 09, 2017 09:44

    Hello, always the same random bug with the Unity 2017.1.1f1 version under Windows 10 x64.

  3. 26ff21e93dce7aaf449a6e4ee580dc55?d=mm

    krougeau

    Sep 05, 2017 07:52

    Still occurring in 2017.1.1f1 (9/4/2017 release). I understand a fix is coming in 2017.2 (and is fixed in the current Beta). Just posting this for anyone else who'd hoped that the latest release had solved the problem...

  4. 7b6112fc9d0ab228c2c4e2666bb05b0d?d=mm

    TheOz

    Sep 03, 2017 17:05

    seeing this in 2017.1p5 just lost a couple of hours of work due to this crash.

  5. Ca00610c0581ae76c4e531a544cbe684?d=mm

    Salazar

    Sep 03, 2017 11:13

    Patch 2017.1.0p5
    Same here.

  6. 7181c6fca09bd7cb8d227a4b8250dd43?d=mm

    SilentParrotStudio

    Aug 31, 2017 14:48

    They fixed the problem in 2017.2.0.b9 (Beta)!!!

  7. C5035e6f9ac6c7ee6b43b629d5ec96ea?d=mm

    su1935

    Aug 30, 2017 16:32

    unity exits automatically many times a day.

  8. 8c126b2f288bc3a5cbd76422c7f97077?d=mm

    letscodestuff

    Aug 28, 2017 03:27

    I just installed Unity today version 2017.1.0p5. I have started watching some tutorials on the site and going through them and appears this happens randomly anytime I alt tab between Unity and Visual Studio. It can happen every 30 minutes to as soon as I start Unity back up and alt tab for the first time.

  9. 22779d66753cc4af08a34a461ce9978a?d=mm

    AlexKostas

    Aug 27, 2017 17:39

    Now it is common for me. It happens at least 6 times a day to me. And I have already lost many hours of work. I have Unity 2017.1. Fix it please!!!

  10. B73bcdee47ea96e48ea9fe349cc61ada?d=mm

    retro_boy

    Aug 26, 2017 23:20

    A dozen crashes a day with this error on MacOS with latest version of Unity. Praying for a fix.

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