Greetings!

I noticed, that it is not possible to copy objects cables etc. from one patch to another via ctrl-c/v.

Is there some way to do that?

Don't know what you mean. It works just fine for me.

I select all the objects I want to copy, press ctrl+c, go to another patch window and press ctrl+v and there it is, objects, cables and everything....

It doesn't work between 2 instances of pd. So make sure you've got only 1 instance running and open both the patches with that instance.

thank you guys!