From peter quint's Attribute Transfer II tutorial, he directly connect the sopsolve node to the RBD object, but it won't work in new version Houdini whether 15 or 16, it shows the that connect to input 0 is the wrong type, and cannot fetch the RBD object into the sop solver, So how can I solve this problem ?

Thanks so much.

disconnect your rbdsolver from the chain and connect multisolver instead
then plug both sopsolver and rbdsolver to the second input of multisolver

Thanks Tomas，
It works, and another thing I want to point out is that if the geo is packed, it need to unpack the geo fist so that can fetch the full geo date.

Thanks again.