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Question by joeybubble1 · Sep 17, 2012 at 07:26 PM · projectbetametafiles

Downgrade project

Hi everyone, recently I downloaded the Unity 4 Beta and then installed it, being the idiot I am, I didn't realize that it wasn't free... so I opened my project (Didn't back it up, cos I'm dumb....) and then upgraded it. I have now created a back up, as I'm now using 3.5.4, so when I try to open the project I get this "Project incompatible, New version of Unity required" There are 2 buttons one saying "quit" and another saying "continue and risk data loss". I click the second and this comes up "Fatal error!" "type == kMetaAssetType & pathName.find ("library/metadata") != 0" I was thinking of deleting everything out of metadata but wasn't sure if I should. Please help Thanks Tz

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avatar image Bovine · Jan 28, 2013 at 08:27 PM 0
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I had my project in SVN and so boldly decided that SVN was my backup. It was, but when I downgraded back to 3.5.6 the Library folder was full of 4.x stuff and I got the type == k$$anonymous$$etaAssetType msg box.

Possibly this won't help you, but it might help someone who follows.

avatar image Varaughe · Apr 22, 2013 at 05:49 AM 0
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Very good Bovine, when I got this error,because of trying to downgrade,I just have to delete the Library folder... it's part of the project not of the scene ,things are clear when upgrading a project ...

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Answer by Itinerant · Sep 17, 2012 at 08:42 PM

I hate to be the one to say it, but...I think you're screwed. Out of all the software I use that aren't marketed as cross-version, there's only one that has software to re-version. And it's not Unity :/

Best suggestion I have would be to create a new 3.5 project, manually copy all of the assets over to it, then go in and fix problems. I imagine all of your meshes/scripts/shaders/etc will be fine, not sure what will happen to scene files.

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avatar image Itinerant · Sep 17, 2012 at 08:43 PM 0
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Though with the metadata - backup your file, delete it and see :) $$anonymous$$aybe it will work, and as long as you have a backup you can't hurt anything.

avatar image joeybubble1 · Sep 17, 2012 at 08:54 PM 0
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ok thanks mate i'll try it out :)

avatar image Nsingh13 joeybubble1 · Nov 12, 2016 at 04:00 AM 0
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Hey, this is very old but how did it go? I have the same problem.

avatar image tanoshimi Nsingh13 · Nov 12, 2016 at 07:36 AM 0
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You also have just upgraded from v3.5.4 to v4.0b?

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Answer by kangdu · Jan 04, 2013 at 11:51 AM

If you open a project file made by 3.5 version of Unuty (ex, Angrybots.unity - 3-5_AngryBots), you can use Unity program ordinarily!! Try open a 3.5 version project file in projetct forder(finder)

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