The object has to exist both in your schematic and in the PCB from which it was created and both have to be in your project, not one you are viewing from someone else.

@andyfierman Hello, txs for the quick feedback. I've checked and it turned out that both are in my project. Still the warning pops up.

Are you using "cross probe and place" in the schematic or the PCB? What happens if you just do "cross probe"? Can you make your project public?

@andyfierman Done. Still warnings. Project is public now. [https://easyeda\.com/editor\#id=\|4fe13c1ea2d04360a639e1c7a07eb1cd\|177b21993c524cd69403832ce8907991](https://easyeda.com/editor#id=|4fe13c1ea2d04360a639e1c7a07eb1cd|177b21993c524cd69403832ce8907991)

I don't know why you see that message. I see it if I try to cross probe an object in _your_ project but then I expect that. If I save the schematic _and_ the PCB into a _new_ project then the SHIFT+X Cross Probe works OK. * Note that because you have named each (what I assume is supposed to be a) ground connection differently (U1, U2, etc.):  your GND Copper Area will not fill:  * If it's GND, netname it GND then give the Copper Area the same net name and it will then fill all the areas and over all the nets you want to connect together as GND. * Note also: when using Pad connection = Spoke, do not route at 45 degrees:  The spokes will be at 90 degrees so your tracks will add 2 more spokes which defeats their function as heat shunts: 

Many thanks for your precious help and hints ! Happy Easter !

And to you, stay safe!