I was trying to measure the rotation of my protein before vs after activation 

using the "measure rotation #0 #1" command, which worked smoothly. 

Then I wanted to check the rotation of specific residues. However, when I tried to specify residues, for example, residue 45 of model0 vs model1, the code didn't work. I have gone through Chimera documentation but didn't really find how to solve the issue.

So, I kindly ask for your suggestions about how I may get residue-specific rotations.

Thank you in advance

Javad Karimbayli