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Downgrading from 2019.1 Beta to 2018.3f2 throws an error.

Discussion in '2019.1 Beta' started by JakubSmaga, Feb 1, 2019.

  1. JakubSmaga

    JakubSmaga

    Joined:
    Aug 5, 2015
    Posts:
    407
    Update: https://forum.unity.com/threads/dow...2018-3f2-throws-an-error.622486/#post-4170211



    I know that the second one is caused by the Timeline which is now a separate package in 2019.1, not sure about the first one though. (I think it's because 2.1.1 is only supported by 2019.1)

    upload_2019-2-1_2-3-24.png

    Edit: Removing the Timeline line and downgrading package manager UI to 2.0.3 (By editing the manifest.json file) fixed the problem. I think this should be done automatically when downgrading from 2019.1 -> 2018.3 or lower.
     
    Last edited: Feb 1, 2019
  2. Peter77

    Peter77

    Joined:
    Jun 12, 2013
    Posts:
    3,130
    As far as I understand the following message, downgrading a project is unsupported.
    screenshot.png
     
  3. Prodigga

    Prodigga

    Joined:
    Apr 13, 2011
    Posts:
    627
    Yep you should never expect a downgrade to work correctly. Back up! Restore if it goes wrong! Even better, use source control.
     
    Charles_Beauchemin likes this.
  4. elbows

    elbows

    Joined:
    Nov 28, 2009
    Posts:
    2,033
    In addition to all the other reasons why downgrading is a bad idea, Unity often runs script upgrade stuff when the API changes, and having to undo that does not sound at all practical.
     
    Charles_Beauchemin likes this.