Copies of objects not rendering

I am a long time SIO2 user, but with the new version, I noticed that when I duplicate objects in Blender, they don't render in SIO2. For example, I make a brick... Object name "Brick". I duplicate it 10 times and get objects named "Brick.0XX". Only "Brick" will render. None of the copies with the ".0XX" extensions will render. What am I doing wrong?

Please don't cross-post

Your question won't be answered faster

Tks!

sorry, I thought I was posting a new topic, but instead posted a response to another. I intended to start a new topic.

thanks, that helped (from other post)