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Fixed in 2018.3.X

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

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. 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.

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Comments (203)

  1. 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).

  2. 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.

  3. LucVdB

    Feb 06, 2017 10:18

    Still happens in 5.6.0b5

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