Upgraded to CS 2019 - clean install on new iMac with latest system. Illustrator CC 2019 crashes constantly, mostly when editing paths - says can't preview then changes to wireframe view then moments later crashes. Adobe have looked into it and have been able to replicate the problem - I presume it is being repaired. Surprised this issue is not being reported more! Program is currently unusable.

Reverting back to 2018(v22) is not an option for me since everyone in my work space uses the newer version. If I use 2018(v22) and open a file made in 2019(v23) it will consolidate everything into one layer. I cannot work like that. Found this and it has helped with some of the crashing. Was crashing every other file... now it's about every so many minutes. Still get the RAM issue though... C'est la vie.

Closed Illustrator 2019. Went to Finder, User Library, Caches and delete the com.adobe.illustrator folder
Reopened Illustrator 2019 and went into my preferences, and in Plug-ins & Scratch Disks I changed my Secondary option from none to Macintosh HD. Then closed and reopened Illustrator.

Mac Pro-Late 2013, 2.7 GHz 12-Core Intel Xeon E5, Memory- 64 GB 1866 MGz DDR3, Graphics- AMD FirePro D700 6144 MB

i am getting them left and right. seven times in a row now. i'm not sure but i wonder if it's related to the properties panel constantly changing every time you click on a new object and then "tour" and new feature pop-ups that keep coming up. it seems like all of that is a pretty big drag on resources. but i've got 16gb of ram, so i know that's not the issue.

Had same issue have 16 G of Ram, but only using 35% still getting crashes do to not enough ram.

Mine also doing this, Illustrator 2019 (v23) is unusuable.
Reverted to previous version and the files I saved in the new version won't open in the old version, what is up with that.

Uninstalled 2019 version v23 and went back to V22. Problem is Bridge 2019 won't recognize previous version. Have to open files through v22. I hope they fix this nonsense soon. Otherwise, v23 is useless for me. Must have gotten that preview warning like 6 times today.

I was getting this when I first installed, but from Friday until yesterday it only crashed once.

Today, no so much. Crashing fairly consistently. I wish I knew what the difference is, it's the same set of files!

Yours
Vern

They aren't going to compensate you. Just roll back to v22. They are on it. I've been talking to the team. But it's apparently a terrible bug they completely overlooked. I don't know why or how, but it is what it is. Just roll your version back to v22 and you're good to go until they fix v23.

It's interesting how we aren't hearing a lot from Adobe on this subject. They had to know this bug existed but sent it out nonetheless. Those of us that remember Quark Xpress know how a company can be dethroned if they don't care about their users.
A question for Adobe: What are you doing about this and what are you going to do to compensate the people who have lost money using this faulty product?

same issue here on new iMac with 16 GB 2400 MHz DDR4/4.2 GHz Intel Core i7. Has happened repeatedly.

This is a big, bad problem guys.

Updates usually have a few minor bugs but this is bad. Crashes multiple times throughout the day including with "Can't finish preview." I've lost a lot of time at work redoing the same things over and over.

Yeah, this is horrible.

Sucks when you use Illustrator for a living. Seriously, simple files not being able to preview on my uber fast gaming PC?? Going back to 2018. Please Adobe, stop updating with trash.

Same problem on Windows 7. Switching back to 2018

I switched back to the 2018 version because I was experiencing this problem as well on a MacOS High Sierra 10.12.6.

I rolled back to the 2018 version also. Following this and other threads for updates.

Same problem ever since 2019 version came out.
MacOS 10.14 Mojave
Late 2014 iMac 27"
4Ghz Quad-Core i7
32GB RAM
AMD Radeon R9 M290X 2GB
2TB Scratch Disk

I'm having the same issue. Just updated to the latest version last week and I've had this happen several times. Not on a super complex image with a million tiny vector nodes, jut basic stuff that shouldn't be taxing the system. I'm usually able to save the file, but it immediatley crashes after that and is difficult to restart.

Mac High Sierra Version 10.13.3
memory: 16 GB

bump.

this has happened to me as well with the latest version of illustrator on creative cloud (cc v 23.0). i reinstalled cc v 22.1 and everything is back to normal and not having this issue