Do you want to recalculate the independent node? If so, unless you want to code the equations yourself, I would just query the id of the independent node, use the api you found, and then renumber the node.

Yes. I want to recalculate the independent node. How to query for nodes ids adjacent of rigid element? How to query for independent node of rigid element?

You can also use the following API to recalculate independent node position automatically:

*createmark elements 1 1
*recalculaterigidmainnode 1

Where you found this command "*recalculaterigidmainnode". Im looking for a command: on this page :

Tcl Modify Commands (altair.com)

because i cant found this command in this page

Mine interpreter in HyperMesh 2023 doesnt recognize this commend :"*recalculaterigidmainnode 1" It is correct or how to use it?

Indeed, this *recalculaterigidmainnode API is not yet documented and available only since v2023.1.
So with v2023, you should use the *rigidlinkupdatecalcinodebycollector command and then renumber the node.

I cant find command which get the nodes connected to rigid body. Anyone can help me with that?

I cant find command which get the nodes connected to rigid body. Anyone can help me with that?

This will get you all the nodes from the rigid:

hm_getvalue elem id=$id dataname=nodes

This will get you the dependent nodes:

hm_getvalue elem id=$id dataname=dependentnodes

And this will get you the independentnode:

hm_getvalue elem id=$id dataname=independentnode