I saw on the Photoshop forum someone was asking about this issue, but hadn't been answered in the last few months, so I thought I would try here as I seem to be having the same issue.
When copying+pasting a large image out of Photoshop and in to Illustrator I get the error message 'adobe photoshop clip image is too big to be exported'. I have a high-end Windows 10 PC running PS and AI 2020, PS has been set to use more than 20GB of available RAM and both programs have been given access to scratch disks with plenty of space.
As 3620x3620 is the maximum size I can copy and paste in to Illustrator without getting the error message. I have attempted to untick 'Export Clipboard' in Photoshop's Preferences > General and this just stopped me copying and pasting, no improvement whatsoever.
Hopefully someone can help with this!?
Also having this issue - can find no solution online despite two threads on it - what's going on here?
Why not just Place it?
Is this equivelant functionality and convenience? If you're alt-tabbing between PS and AI and copy/pasting between the two, whcih I frequently need to at print scales - then I'm not sure it is, unless you can shed some light.
It may be easier to copy and paste, but you will not lose anything with placing instead.
Seeing as I have 64GB ram available - it should be fairly elementary to copy paste large file sizes between software of the same developer without hinderance - without an unexplained resolution cap of 3620 pixels.
I don't really see your point of 'do it a less convienient longer way that removes the advantage of the thing you are asking for'- the feature of PS to AI copy/paste is there, it has a seemingly overlooked physical limit applied which my system exceeds the requirements for - I'm asking for this to be fixed.
At a guess I wonder if this cap was applied at an earlier V number to address older systems crashing, but as stated, this isn't a problem now.
I've explained why I don't want to/why it is not useful to me to use place instead. Re-iterating to me that place exists isn't in any way helpful.
Has this ever been resolved? As someone who is frequently trading between programs this is an infuriating bug with a seemingly elementry fix...
Adding my comment so that this thread gets more visibility. This bothers me to no end as well. It is possible to add to the library then do it from there but as you said in a different comment, it's not as convenient as copy and paste. All this effort into making workflow as efficient as possible and then there's this arbitrary limitation just seemingly being ignored.
Same issue here. Since I didn't copy from Photoshop to another Adobe program, but rather Krita (I later tried it with Discord and other applications) I didn't even get an error message and spend about an hour searching the web for a fix. I don't understand this "feature", since all other programs I tried handle copy and pasting large images even on my somewhat old computer.