24 Apr
                
                    2015
                
            
            
                24 Apr
                
                '15
                
            
            
            
        
    
                7:05 p.m.
            
        Hi Irina, it needs to be refinement.refine.sites { rigid_body = chain A or chain B } note "or" above, because this is a Boolean logic. Does this work now? Pavel On 4/24/15 12:01 PM, Irina PROKHOROVA wrote:
Hello,
how can i select two chains to be refined as one rigid body? I tried refinement.refine.sites { rigid_body = chain A and chain B } but it did not work.
Irina