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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 (202)

  1. 5ce1c744c12e4d27a9ecae0aeeb8e206?d=mm

    sbrodie

    Jul 14, 2017 17:59

    Happening regularly on Unity 2017.1.0f3, both new and upgraded projects.

  2. 847e45ffa050827b3aa861724a1d978f?d=mm

    darthbator

    Jul 14, 2017 08:47

    This issue is not fixed I am still encountering it as well

  3. C229ab4a65c236bda29bbb4c9f49b765?d=mm

    Cynikal

    Jul 14, 2017 06:30

    Just happened to be in the latest release of 2017.1.0f3

  4. E6c0a296a3afb5dca284e1135fab2630?d=mm

    ventedpennies

    Jul 14, 2017 04:22

    This is not fixed for 2017. I have never received this error, now I receive it on a regular basis.

  5. D2d4a0a93bec32a32699460b28b55c9a?d=mm

    RafayAli

    Jul 13, 2017 12:12

    Its happening ever since I installed 2017.1, never happened even once when using previous versions.

  6. D2897a7d9e4037ec55cc67bdaa47cdae?d=mm

    ReneBuehling

    Jul 12, 2017 17:27

    This is NOT resolved. It still happens in 2017.1.0f3 (64-bit)

    Actually it happens even *since* I am using 2017.1, and did not happen before. :(

  7. 0c31cb52e011ea29f0ad1594afb06b5e?d=mm

    Atticite

    Jul 11, 2017 19:38

    Just encountered this one in 2017.1.0f3, so not entirely fixed ...

  8. 32e0de6e91fbb0f524bf6a808bfa0c7d?d=mm

    fogsight

    Jul 02, 2017 01:27

    "Fatal Error!
    Callback registration failed. Increase kMaxCallback."
    Unity 2017.1.0f1
    Happens sporadically. Last time on Alt-Tab back when left running scene in Play mode.

  9. 9a2fd59f9b15d8b790a5446d5ce08cec?d=mm

    Lepascal

    Jun 20, 2017 10:38

    Idem in Mac Unity 2017.1.0.B9.

  10. 91294277da1d2413ca7bbe10e0a52b17?d=mm

    himzy

    Jun 18, 2017 14:54

    Still happening

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