The file ".ai" is in an unknown format and cannot be opened

Community Beginner ,
Aug 21, 2017 Aug 21, 2017

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Hello

I'm having this issue when I try to open recent files from Illustrator or Acrobat.

See image:

Captura de ecrã 2017-08-21, às 09.34.45.png

I have a MAC OX El Capitain 10.11.6.

Can you help?

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correct answers 1 Correct answer

New Here , Jan 14, 2018 Jan 14, 2018
Hey all,I know I'm late to this, but it may be helpful for future problems, on a Mac at least. In Finder, go to the corrupted file, right click, "Get Info", remove the .ai file type from the name, MacOS will prompt with something like "Are you sure that you want to remove the file extension?", click yes. Then add the .ai back, you'll get another dialogue warning about changing the extension, click yes, and it should be good to go.

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Adobe Community Professional ,
Aug 21, 2017 Aug 21, 2017

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Which version of Illustrator?

Are you working on the file on just this machine?

Where do you save your files?

What's in the file?

Is it an older file?

When did you last restart that computer?

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Community Beginner ,
Aug 21, 2017 Aug 21, 2017

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Hello Monika

Which version of Illustrator? Adobe Illustrator CC 2017

Are you working on the file on just this machine? We can work the files on other computers equal to mine

Where do you save your files? They are saved in a QNAP

What's in the file? Vector/images/fonts

Is it an older file? Recent one

When did you last restart that computer? Today

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Adobe Community Professional ,
Aug 21, 2017 Aug 21, 2017

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You could try if one of the other computers can still open the file.

But the network drive most probably causes the issue

There is a known issue with Illustrator and saving to/opening from networked drives.

Illustrator support for networks and removable media

For some people it works, for others it doesn't.

Also: it might work for some people, but not for others in the same building.

A more reliable workflow would be to first copy the file from the server, then edit it and save to your harddisk, then upload to the server again.

If no other computer can still open the file, try and work from an older backup.

Also: try and create a new Illustrator file and place this AI file in it. But since you also can't open it in Acrobat, there's little chance this will work.

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Adobe Community Professional ,
Aug 21, 2017 Aug 21, 2017

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Sounds like a corrupted file to me.

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Adobe Community Professional ,
Aug 21, 2017 Aug 21, 2017

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Sounds like a corrupted file to me.

Well, yes.

But before I give up all hope, I'd like to have those questions answered. If only to prevent this in the future.

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Adobe Community Professional ,
Aug 21, 2017 Aug 21, 2017

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Yup, sounds like you have a corrupt file on your hands.

Try placing it in ID.

Export as an EPS and open in Ai.

HTH

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Adobe Community Professional ,
Aug 21, 2017 Aug 21, 2017

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https://forums.adobe.com/people/master+mo  schrieb

Try placing it in ID.

Placing it in InDesign is the same as placing it in Illustrator (only more complicated).

If placing in Illustrator doesn't work, placing in ID won't either.

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Community Beginner ,
Aug 21, 2017 Aug 21, 2017

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Good morning all

Nothing really worked. We tryed everything, and nothing.

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Adobe Community Professional ,
Aug 21, 2017 Aug 21, 2017

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What about filesize is it more than 0 KB?

There are services and applications that claim to be able to recover files. Don't know if it works, but you might want to try.

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New Here ,
Jan 14, 2018 Jan 14, 2018

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Hey all,

I know I'm late to this, but it may be helpful for future problems, on a Mac at least. In Finder, go to the corrupted file, right click, "Get Info", remove the .ai file type from the name, MacOS will prompt with something like "Are you sure that you want to remove the file extension?", click yes. Then add the .ai back, you'll get another dialogue warning about changing the extension, click yes, and it should be good to go.

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New Here ,
May 18, 2022 May 18, 2022

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what a life saver!!! thank you so so so much for this because it worked amazingly! i wish you gonna have a great day cuz you made mine james!

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New Here ,
Mar 29, 2021 Mar 29, 2021

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I had an ai file from 2019 that would not open, it said "unkown format and cannot be opened. I opened it in PS 2019, closed it and I was able to open it in AI!!! I did not test to see if I opened it in PS 2021 if it would open in AI

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