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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 (206)

  1. 1638b3b2d3276fe5ab79eaff2464fbf7?d=mm

    Omniauric

    Aug 10, 2017 03:15

    2017.0.1f3 here. This is a brutal issue. Even though I'm paranoid and saving constantly, I'm still occasionally losing work. It's still early in this particular project, so I'm starting to consider maybe using a different engine.

  2. Beb5f61b7198f66d0882b808affcecb5?d=mm

    zenyata

    Aug 10, 2017 02:33

    it happens every 3-4hours.

  3. 29011e2d5799cebf18b5190a6566f4aa?d=mm

    Hafazeh

    Aug 09, 2017 03:35

    This is happening here on my end as well, i might just have to go back to 5.6.0f3 as i was not getting this error there.

  4. F800720040398ae638193f28d28635e8?d=mm

    Mighto360

    Aug 08, 2017 13:56

    Happens on macOS Sierra 10.12.5, Unity 2017.1.0f3. It's a big problem for me.

  5. 09b6f9f3f3f764bc39a173f48dc11dbb?d=mm

    BoraxKid

    Aug 07, 2017 11:25

    Happens here on Unity 2017.1.0f3 on Windows 8 Entreprise 64 bits.

    The Bug Report window did not show up

  6. 780a1a3fe1095c9933959882b968c211?d=mm

    hht

    Aug 07, 2017 08:38

    Happens very often in Unity 2017.1.0f3 on macOS Sierra 10.12.6

  7. 6c0b7a04056cb4cbdd4cf5980ba6bd03?d=mm

    Cemaprjl

    Aug 07, 2017 03:51

    windows 10, 2017.1.0p1, comes several times in a day

  8. E97616160b76782c852d20a7b4aa23a0?d=mm

    Denki_Gaka

    Aug 05, 2017 01:24

    Occurring multiple times each day in 2017.1.0f3. Never saw before that. However, I am getting much better about saving my scene every time before I run. 8^)

  9. 6afbab9aa3198d4594dfd360f122e0df?d=mm

    BoaNeo

    Aug 05, 2017 00:44

    Oops, forgot the details: 2017.1.0f3 running on OsX, latest mac book pro... Seem to happen regardless of size and nature of the project I have loaded, and so far it has always happened when pressing play (I only have one instance running).

  10. 6afbab9aa3198d4594dfd360f122e0df?d=mm

    BoaNeo

    Aug 05, 2017 00:36

    Also seeing this every odd-hour randomly after upgrading to 2017.1

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