Often when you go to print a downloaded file, you will get a few "Object Required" warnings. These warnings are just letting you know that there are some images that you do not have on your computer.
This can happen when the file you downloaded has .gif type non-library images in it. If the person sharing imported some .gif images these are not coming along with the files. You can still print, just click "ok" on the object required messages.
We are working on saving the .gif images along with the rest, when that update is ready we will announce it here.
You can also get the "Object Required" warnings if the person uploading used Brickyard or Graffiti plug-ins and you do not have those plug-ins yet .