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