spine project version downgrade from 4.1 to 3.8

obaz

Hi all!
I'm trying to do a version downgrade from 4.1 to 3.8.
I've tried to export jason file from 4.1 to 3.8 compatibility mode. Unfortunately, I can't import it into spine 3.8, and weird errors appear during the export. For example, "Welcome data download failed, server error: 410"

Misaki

obaz
I'm sorry to hear you're having trouble.

For example, "Welcome data download failed, server error: 410"
This error is harmless.

You were able to launch Spine 3.8 itself, right? Could you tell us what happened when you tried to import the json file?

obaz

Apparently, the only way to do this is the following:
4.1spine export to 4.0 json,
4.0 spine import 4.0 json export 3.8,
3.8 spine import 3.8 json.

Misaki

obaz No, that is not correct because Spine 4.1 can export JSON files as the format for 3.8, 3.7 or 3.6 by choosing the desired version in the Version option: http://esotericsoftware.com/spine-export#Version

If you exported the JSON file in 4.1 with Version set to 3.8, you should be able to import that JSON file in 3.8. If you prefer, you can send us your Spine project via email so that we can see what the problem is: contact@esotericsoftware.com

Mario

Note that you will potentially lose data when downgrading from 4.1 to 3.8. If you use any of the features introduced after 3.8, the resulting json file exported from 4.1 will not contain that data. 3.8 doesn't know how to handle new features.