oddity in object pose

[Cooldad]

Hi everyone

when I copy an object after placing it the first time, I have a window that opens and tells me that my library is missing

I don't understand what's going on.
This happens in files from previous versions only, not in files created with version 28
Why?

Operating system used: Mac Apple Silicon Sequoia 15.2

[Barry Kelly]

Copying within the same file?

This shouldn't happen.

If an object is placed in plan and it shows correctly, it means the libraries are loaded.

What object is it and maybe you could show a screen show a screen shot of your library manager.

Copying and pasting from a 28 file into a 27 file?

This may well happen if the 28 libraries are not loaded.

Barry.