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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. 39922b28837bb29565fee24b22551304?d=mm

    nuthman

    May 22, 2017 20:19

    Just happened to me: 2017.1.0b5

  2. 75d220509e893d8048bf89d3db6b1bc9?d=mm

    FlopCoat

    May 19, 2017 10:07

    Still around in 2017.1.0b5

  3. 950b0ab92cc2d6f1a11a301f653ce104?d=mm

    tdvance

    May 12, 2017 15:52

    Wait, why is this marked resolved? it clearly isn't....

  4. 950b0ab92cc2d6f1a11a301f653ce104?d=mm

    tdvance

    May 12, 2017 15:52

    Happens in Unity 2017.1.0b4 almost every session.

  5. 692e2a40b022fd07b4b5e982d48ab8e7?d=mm

    haskins

    May 01, 2017 22:48

    It's happened a few times to me using Unity 2017.1.0b2.

  6. 6507be09f6aa1f4cbcfbf838c9830daa?d=mm

    SpookyCat

    Apr 26, 2017 14:37

    Still happens in Unity 2017b1

  7. 1f2899aa5fc8c30aa97a7ffcc1be6cfe?d=mm

    GameEverything

    Apr 23, 2017 10:43

    Occurs in 5.6.0b3. I'm just glad that it saves or whatever because I know I sure as hell forgot to save after five hours of work, lol.

  8. Fdb8c357549ae3170c85034d6b7c574c?d=mm

    swerly

    Apr 04, 2017 18:48

    Continuously happening to me on 5.5.0f3. I don't even have the program open for that long, sometimes <30min

  9. 8319ad8cdfb4e04c0e26b766125595c9?d=mm

    codingcat1

    Mar 31, 2017 00:10

    This happened to me in version 5.5.2f1. Unity left open for at least a day or two without closing (computer on sleep overnight). Received this message after 8ish hours of use on the last day).

  10. 1555ae110c6d7a692c7a2535575c795d?d=mm

    davidhallahan

    Mar 10, 2017 14:27

    Just happened to me on 5.50f3 on Windows. Unity left open overnight, then crashed after 45mins of use. After updating a CS file in VSCode, crashed when returning to Unity.

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