Search Issue Tracker

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 (206)

  1. 51976c7e37cee1ef8edc03396ed2f4f9?d=mm

    archelyte_vz

    Aug 04, 2017 18:32

    This is happening about 3-4 times a day. This is ridiculous.
    2017.0.1f3

  2. Caa2b7038d6b102cf80dbc10902e6fda?d=mm

    RFJ

    Aug 04, 2017 07:48

    Yeah BIG problem for me and my team happens at least 3 times a day

  3. B5650936c620df315e9d8578c3b90f1e?d=mm

    Zakari

    Aug 04, 2017 03:43

    ye, this is a big problem for me.

  4. 26f04b2524e836d041c887537c94633b?d=mm

    raxor12

    Aug 04, 2017 03:23

    with Windows 8.1too , I just move to unity 2017.1.0f3 and that is when begun the problem

  5. 299c8c4bdf7d1b68fe61ac92868e3b3e?d=mm

    TiagoSerra

    Aug 04, 2017 03:16

    Same here on both clean install of OSX Sierra latest update and also latest 64 bit windows 10

  6. C894dfe0fe74ccccd3afa8d71dfda3c5?d=mm

    gss214

    Aug 04, 2017 00:02

    same here. win10 64bits and unity 2017.1.0f3

  7. 21de20b393f84384a101dcf6bb21e0be?d=mm

    DavidErosa

    Aug 03, 2017 15:12

    Same with Windows 10 64 bita and Unity 2017.1.0f3. Editor closes and no bug report dialog. I can't find a way to reproduce it but for me it's always when I enter Play mode after coming back from Visual Studio.

  8. 07eca6e936a6546e34e48dcfa62f8e0d?d=mm

    VishalFbs

    Aug 03, 2017 11:55

    Facing same issue for window 8 and unity 2017.1.0f

  9. 6077f3abce7ab0aaad9dcdb07967adf4?d=mm

    Ashwin-Star

    Aug 02, 2017 19:26

    Fatal Error! > Callback registration failed. Increase kMaxCallback.

  10. 6077f3abce7ab0aaad9dcdb07967adf4?d=mm

    Ashwin-Star

    Aug 02, 2017 19:24

    happened twice so far, once when Played the scene another when switched from Mono to Unity. ver 2017.1.0f3

Add comment

Log in to post comment

All about bugs

View bugs we have successfully reproduced, and vote for the bugs you want to see fixed most urgently.