I'm having once a while a problem I can't solve.
I copy a object from one file/project (eg wall) with Ctrl + C, switch to second file/project and when I try to paste it Ctrl+V it blinks for a second and disapears withaout pasting it.
This happens in AC21 and AC22 ass well.
Restarting the file to which I paste usually helps but after few times it starts again.
I tried swithing off Antialising and 2D acceleration without a result.
I have just had a few disappearing pastes as well, but I think it was entirely my fault.
When you paste it places the elements but does not finalise the placement until you click again outside of the bounding box.
I was finding I did the paste and was then clicking on my second screen to do something else.
Go back to Archicad and the paste would disappear as it was never completed.
One of the forum moderators. Versions 6.5 to 27 Dell XPS- i7-6700 @ 3.4Ghz, 16GB ram, GeForce GTX 960 (2GB), Windows 10 Lenovo Thinkpad - i7-1270P 2.20 GHz, 32GB RAM, Nvidia T550, Windows 11
Just to make sure:
Are you sure it is not there? Is it maybe possible that it is hidden under another element?
You could select all and see if it is there.
Or, you could hide all layers and paste it then, so it will surely not be hidden under any other element.
Get Archicad Tips at https://twitter.com/laszlonagy AMD Ryzen 1700X CPU, 48 GB RAM, Nvidia GTX 1060 6GB, 500 GB NVMe SSD 2x28" (2560x1440), WIN10 PRO ENG, AC20-AC26 Loving Archicad since 1995