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Active

Votes

270

Found in

5.6.0b5

Issue ID

873467

Regression

Yes

Unity crashes with Fatal Error: Callback registration failed kMaxCallback

Editor - Other

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Priority: 2Necessary for shipping a final release

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Severity: 1Crash or major loss of functionality

Unity crashes with a 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

Result: Unity crashes with Fatal Error.

Reproduced with: 2017.1.0f3
Not reproduced with: 5.6.2p3

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.

Response avatar

karl_jones

Sep 11, 2017

This is now fixed in 2017.1p1
A fix will be available in an upcoming patch for 5.5 and 5.6

Comments (140)

  1. E0329cc616ae6c6ebecf5bf586890a78?d=mm

    martipello

    Sep 23, 2017 21:46

    issue still present in 2017 1f3

  2. 5d16e340bf36b8081776ba58a871d084?d=mm

    Muggleking

    Sep 23, 2017 17:17

    An issue in 2017.1.1f1

    Very annoying........

  3. 70bb69be2c8ec202839e71efabf6be59?d=mm

    outshinestudio

    Sep 22, 2017 17:14

    This is still a problem in 2017.1.1f1. It happens randomly and it is very frustrating! One can actually lose a big deal of work because of this!

  4. 65f6226452f8205c7131423a500e0ea7?d=mm

    ermisdekatech

    Sep 22, 2017 04:56

    *Update on installing p1 to take care of kmaxcallback issue.*

    Installed p2, didnt work. Realized p1 had a specific patch for it, uninstalled unity entirely from Mac. Installed fresh p1, logged in, worked on the project, everything worked fine. Logged into the machine next day, p1 doesnt show any of the builds installed with unity, no android, no ios, not even web-gl. Everytime the same project which worked till yesterday, when opened today in p1 says android build, iOS build isnt installed. We had a game planned for Unite India in November, third day with issues now, this is wasting precious time in crunch period. I am an indie, we cannot up and organize another machine to run unity on in a few days :(

    This is very frustrating.

  5. 65f6226452f8205c7131423a500e0ea7?d=mm

    ermisdekatech

    Sep 21, 2017 12:44

    had a grey screen issue after unity crashed with the kmax callback for the third time in 3 days. Downloaded 2017.1.1p2

    Still the same problem, grey screen, wont show login or project selection options.

    Here's my log file:

    COMMAND LINE ARGUMENTS:
    /Applications/Unity/Unity.app/Contents/MacOS/Unity
    [warn] kq_init: detected broken kqueue; not using.: Undefined error: 0
    [warn] kq_init: detected broken kqueue; not using.: Undefined error: 0
    [warn] kq_init: detected broken kqueue; not using.: Undefined error: 0
    [warn] kq_init: detected broken kqueue; not using.: Undefined error: 0
    [warn] kq_init: detected broken kqueue; not using.: Undefined error: 0
    [warn] kq_init: detected broken kqueue; not using.: Undefined error: 0
    [CEF] undefined in file:///%2FUsers%2Fyadayadayada%2FLibrary%2FUnity%2FPackages%2Fnode_modules%2Funity-editor-home%2Fdist/assets/unity-editor-home.js at line 39
    Request timed out while processing request "https://core.cloud.unity3d.com/api/login", HTTP error code 0
    .[UnityConnect] Request timed out.
    Request timed out while processing request "https://core.cloud.unity3d.com/api/login", HTTP error code 0
    .[UnityConnect] Request timed out.
    Callback unregistration failed. Callback not registered.

    (Filename: /Users/builduser/buildslave/unity/build/Runtime/Core/Callbacks/CallbackArray.h Line: 192)

    Checking for leaked weakptr:
    Found no leaked weakptrs.
    ##utp:{"type":"MemoryLeaks","allocatedMemory":281729,"memoryLabels":[{"Default":1664},{"Manager":208},{"BaseObject":10496},{"Terrain":224},{"String":5788},{"DynamicArray":36},{"PoolAlloc":-224},{"GI":1256},{"EditorGui":64},{"EditorUtility":544},{"RestService":256},{"License":252176},{"UnityConnect":9232},{"Collab":9}]}

    Tried sending bug reports with updates of error logs, no reply for unity. This is frustrating. Completely uninstalled and reinstalled Unity twice, nothing works.

    Am going to try booting up with a horse shoe or a 4leaf-clover, maybe that'll help.

  6. Dc1b254760f44d16cd4f684456bf554f?d=mm

    karl_jones

    Sep 20, 2017 11:30

    2017.1p1, not 2017.1f1.
    The p stands for patch and can be found here: https://unity3d.com/unity/qa/patch-releases

  7. 4c1d9ac922b834a76e3d157ca9d332ae?d=mm

    mgmasson

    Sep 20, 2017 04:59

    If this is fixed in 2017.1.1p1 why is it not being pushed to the public?? I just lost my entire project to this and I'm running the latest non-beta release 2017.1.1f1 according to the Unity updater and the latest installer.

  8. 0c08b6a68d2f51913b5acf86bd11f38e?d=mm

    Don-Tako

    Sep 19, 2017 03:07

    Same problem in version 2017.1.1f1... My PC is not a NASA computer so I must wait 2 ~ 3 min to reopen my projects every time this bug happens...
    Windows 7 Professional 64bits SP1

  9. 1f2899aa5fc8c30aa97a7ffcc1be6cfe?d=mm

    GameEverything

    Sep 18, 2017 22:19

    Lol, what are you talking about? This issue isn't fixed and I'm using version 2017.1.0f3. In fact, this time around it actually corrupted my project where now the project won't even load causing a crash each time.

    Oh, I do want to say, though, that I appreciate all of the hard word you put into fixing these issues and I know I sound a bit snarky, lol. :)

  10. 81c9cca8ee0e136fe3c626fc762cb689?d=mm

    Dawid_Matuszewski

    Sep 18, 2017 12:13

    The same here
    System: Windows 10 Pro 64 bit
    Unity : 2017.1.1f1 64 bit
    it's very annoying - every ~30 minutes.

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