Try to first select master and slave nodes and then apply the RBE2 command.

Hajar Rhylane Tomáš Létal

1. Identify the node and surface nodes: Determine the node number and the surface nodes to which you want to create the rigid link.

2. Define the node set: Create a node set that includes the node you want to link. You can use the *NSEL command to select the node(s) and assign them to a set. For example:

````

*NSEL, N, , , node_number

*NSUBSET, node_set_name

```

Replace `node_number` with the actual node number and `node_set_name` with a suitable name for the node set.

3. Define the surface set: Create a surface set that includes the surface nodes you want to link to. You can use the *ASEL command to select the surface nodes and assign them to a set. For example:

````

*ASEL, S, , , , , , , , surface_nodes

*SSUBSET, surface_set_name

```

Replace `surface_nodes` with the appropriate selection criteria for the surface nodes and `surface_set_name` with a suitable name for the surface set.

4. Define the rigid link: Use the *CONSTRAINT command to define the rigid link between the node and the surface nodes. Specify the node set and surface set names created in the previous steps. For example:

````

*CONSTRAINT, TYPE=RIGID, NODE=node_set_name, SURFACE=surface_set_name

```

Replace `node_set_name` and `surface_set_name` with the names you assigned to the node set and surface set, respectively.

5. Repeat as needed: If you have multiple nodes or surface sets to link, repeat steps 2 to 4 for each node and surface set combination.

6. Generate the rigid link: Finally, issue the *SOLVE command to generate the rigid links and solve the analysis.

Good luck: credit partial AI

Mohammad Imam Have you actually tried the approach? I am pretty sure the AI does not know APDL syntax. Stars are only in front of some of the commands and you cannot pass parameters into procedures using = symbol.