I'm having problems with copyclip, I received a draw to make some changes, I decided make a new draw and use some objects of the original  base draw, but when I copy that objects appears that doesn't exist selected objects, try different ways but always appear same answer, I will appreciate if somebody can help me.thanks

What happens if you select all your objects in Drawing #1 with Ctrl-Shift-C (Copy w/ basepoint) and Ctrl-V (paste) them into Drawing #2 that way?  Make sure you have PICKFIRST=1.I have seen a number of threads, especially for users on AutoCAD 2010, talking about issues with COPYCLIP.Dave.

Is your version of AutoCAD up to date with all service packs?So you copy from one drawing and paste to another but you don't see the objects?  Did you do a Zoom > All or Zoom > Extents?Did you check to see if any layers were turned off or frozen?

Thanks for your advice, I try to solve them as well but the problem continues , I found how to copy objects using Drawing utilities  with the recover command first and then use ctrl-shift-c to copy otherwise not be done.Regards.

Hopefully you have found a solution, but if not, post another question with more details and we'll see what we can do to help.  Without seeing your drawing or what happens when you try to move objects from one to another it is difficult to give you accurate answers.
 
And it is never easy to solve technical questions when there are language translation issues either.  One idea might be for you to re-post your problem in your native language.  We can then use online translator or someone who reads it natively can help.  Still lots of options open here.
 
Dave.

I'm left wondering how the RECOVER command somehow helps you with COPY/CLIP.