I hope this email finds you well. I have a molecule that I created through the build feature in Chimera, and what I would like to do is just create a sphere of as many copies as it can fit to see the estimated encapsulation volume. However, there is no symmetry assembly to use the matchmaker and I was trying to use the sym command, but it isn't even recognizing the command.

sym #1 i,222

sym #1 i, n25

Sym#1 i, 222r

I have tried others with the center command, and I also tried to add copies false NewModel true at the end. What am I plugging in wrong? 

The molecule is saved as a pdb, and uploads no issue on ChimeraX.