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Track cannot be loaded

Discussion in '2021.2 Beta' started by Havokki, Apr 2, 2021.

  1. Havokki

    Havokki

    Joined:
    Jun 28, 2015
    Posts:
    118
    I tried opening my project in Unity 2021.2 (a11 to be precise) and now all custom timeline tracks show "Track cannot be loaded" warning. They have been working fine since 2019.2.

    I re-imported the timeline asset and I got this warning. Re-importing the related scripts gave similar warnings.
    Closing Unity, deleting Library, and then starting Unity again makes the tracks work for a while. I can enter the play mode a few times before the tracks suddenly cannot be loaded again. Only deleting Library folder seems to fix it.

    Is there some upgrade step that needs to be done? Or is this simply a bug?
     
  2. LeonhardP

    LeonhardP

    Unity Technologies

    Joined:
    Jul 4, 2016
    Posts:
    3,143
  3. Havokki

    Havokki

    Joined:
    Jun 28, 2015
    Posts:
    118
    I tried with a13, and it seems to work a bit better.

    Now all tracks are unloadable when I start Unity, but re-importing related scripts fixes it, and they seem to work even when I start the game or make code changes. However, restarting Unity makes them unloadable again.

    I'll try to repro this in a smaller project that I can share and report a bug at some point this week.
     
  4. LeonhardP

    LeonhardP

    Unity Technologies

    Joined:
    Jul 4, 2016
    Posts:
    3,143
    Thanks, that would be very helpful!