The operation cannot complete because of an unknown error [CANT]

[#1]

I recently started getting this message as soon I open Illustrator "The operation cannot complete because of an unknown error [CANT]" and once it opens all my tool windows are hidden and I have to open them one at a time. Can anyone help.

[#2]

I recently started getting this message as soon I open Illustrator "The operation cannot complete because of an unknown error [CANT]" and once it opens all my tool windows are hidden and I have to open them one at a time. Can anyone help.

[#3]

Which version?

Which system?

Third party plugins?

Did you update anything recently?

[#4]

Hello, it happen with the latest version 20.3. Out of the blue the error pop up. I already uninstalled the app with the CC cleaner tool, reinstalled it and still having the same error pop.

[#5]

Please look up the exact version in "About Illustrator" and tell us your system.

Also: did you update anything (system, Illustrator, anything else)

[#6]

Sorry the exact version I was using when this happen was Illustrator CC (22.1). I'm using a Macbook Pro 2017.

And I did not made any updates at all.

[#7]

So you also deleted the preferences?

Is a printer connected?

You're not using the latest version.

[#8]

Yes I did.

No printer connected. I downloaded the latest version now.

[#9]

This is a pretty common issue - make sure the account you are running has Admin privileges and the system folders have permissions set properly.

[#10]

All fixed. Thank you, I totally forgot to delete the old preference folders.

[#11]

How do you get admin priveleges

[#12]

How do you delete preference folders

[#13]

Please learn about how your system works.

The documentation of either Apple or Microsoft tell you that.

[#14]

Can you try it under another user to see if the problem persists. This will also make us aware if it is a user preference issue or a system issue.

[#15]

Katie, I have try with another user and still nothing.

[#16]

Same error message while taking a traced object to which I had successfully applied a Gaussian blur, and when I click on the Gaussian blur in object appearance and try to modify how many pixels of blur to apply, I get the same message (along with the follow-up message "An error occurred while processing the appearance of an object") and the previously applied Gaussian blur no longer appears. Even if I completely delete Gaussian blur from the appearance, and try to re-apply it, I get both of these error messages.

I'm using the latest Illustrator build 24.0.1 on the latest Mac OS Catalina 10.15.2. No third party plug-ins. And yes, the OS updated within the last 24 hours. 

[#17]

Any update on this? Did you solve this? I got the same exact error when applying a 3d effect out of the blue.

[#18]

"Any update on this? Did you solve this? I got the same exact error when applying a 3d effect out of the blue."

Which version? Which system?

Does it work after a computer restart?

Does it work with simple objects? A rectangle?

[#19]

The operation cannot complete because of an unknown error cant.

getting the same error and I tried to uninstall and reset preferences and reinstall. but still getting error. Please help me.

I am using windows 10 pro version: 2004 Illustrator version 24.3.0

[#20]

What exactly are you doing when this happens?

Please tell us more about the file - is it an old file? What is in it?

And please create a new thread for your issue, since the directions in this one don't help you.

[#21]

I press an OK button when showing error "the operation cannot complete because of an unknown error [cant]"

And illustrator opens but not working properly like a new file or anything.

when I illustrator exit the illustrator crash. what should I do please help me fast.

Recently I updated illustrator last version 24.1.1 and recently update 24.3.0

[#22]

What exactly are you doing that causes this to pop up?

Did it just start to happen?

Is it just one file?

[#23]

Every time when I open an illustrator pop up a showing.

when pressing ok button illustrator open and didn't work and when I quit then illustrator crashed.

[#24]

I'm sorry I can't make a lot of sense out of your answers. This might be a language problem. If English is not your mother tongue, please try and answer in your native language. There is a translation available and maybe even someone here can speak your native language.

If you are not comfortable digging around in your system, you can also just contact Customer Care: https://helpx.adobe.com/contact.html

[#25]

Ok me hindi me batata hu.

me jab bhi illustrator open karta hu tab ye error ka popup show hota he. Or me popup ko ok butten press krta hu tab illustrator open hota he but illustrator work nhi karta h jaise ki new artwork tool kuch bhi properly work nahi krta he. Fir jab illustrator close karta hu to illustrator crash ho jata h. So what should i do for this problem. Jald se jald solve karo kyuki bahot kam pending h mera me graphic designer hu or illustrator nhi chal rha he. 😭

[#26]

same issue. also, tried older versions, I reinstalled it many times. Please help.

[#27]

Did you try everything that has been suggested in the whole thread?

There are some questions posted all around the thread. Please answer them.

[#28]

"Solution for Adobe Illustrator. Regarding the problem...

"The operation cannot complete because of an unknown error. (CANT)"

The problem is caused by some files in the directories.

"c: \ Program Files \ Common Files \ Adobe \ UXP \"

In Windows 10 (X64)

Rename to "c: \ Program Files \ Common Files \ Adobe \ 00UXP \"

(In this way they are not erased and you can return to them, for if other programs fail)

It contains the routines for the start screen and new documents of the different Abobe programs.

https://helpx.adobe.com/photoshop/kb/troubleshoot-home-screen-issues.html

luck!!! 😉 :)"
Changing UXP to 00UXP worked like a charm!! This actually works for me!!!

For more info, Please, follow this link: https://illustrator.uservoice.com/forums/601447-illustrator-bugs/suggestions/36301807-the-operation-...

[#29]

I also had the same problem. when the pop up appears and i press ok, it's not going well. I have deleted my preferences folder but it still pop up when I want to run adobe illustrator. I have tried to reinstall it many times but it still appears. I am using version 24.2.3 in windows 10

[#30]

"Solution for Adobe Illustrator. Regarding to this problem...

"The operation cannot complete because of an unknown error. (CANT)"

The problem is caused by some files in the directories.

"c:\Program Files\Common Files\Adobe\UXP\"

In Windows 10 (X64)

Rename to "c: \ Program Files \ Common Files \ Adobe \ 00UXP \"

(In this way they are not totally erased and you can return to them in the future, for if other programs fail)

It contains the routines for the start screen and new documents of the different Abobe programs.

https://helpx.adobe.com/photoshop/kb/troubleshoot-home-screen-issues.html

luck!!! 😉 :)"
Changing UXP to 00UXP worked like a charm!! This actually works for me!!!

For more information, Follow this link: https://illustrator.uservoice.com/forums/601447-illustrator-bugs/suggestions/36301807-the-operation-...