Adds the given node of the current/specified model to the measure. 
    Syntax
      
      poIMeasure_handle
        AddNode
        "model_id node_id"
    
    Application
      
      HyperView Tcl Modify
    
    Description
      
      This command adds the given node of the current/specified model to the measure.
            
Note: HyperView allows you to specify the measure between
          several models loaded (overlaid) into the same window. This is why you have to provide the
          model ID and node ID (or element ID) when you add a node or element to the
        measure.
Inputs
      
      
        
          - node_id
- The node ID in one of three forms: 
              
                - "m1 n1" (A regular node)
- This option adds a node from a model with the ID = m1 and the node ID = n1. This
                  is the most common function you will use to create measures from scripts.
 
- The following two options are used mostly by the HyperView
            GUI to create a measure on a section cut, or Iso surface.
              
                - "m1 n1 n2 %1" (A param node)
- This option adds a "parametric" node from the model with the ID = m1 and the
                  nodes n1 and n2, and at %1 distance between n1 and n2.
- "m1 n1 n2 %1 n3 n4 %2 %3" (A param-param node)
- This option adds a "param-param" node from the following model types:
                    - A model with the ID = m1 and the nodes n1 and n2 and at %1 distance between
                      n1 & n2.
- A model with the ID = m2 and the nodes n3 and n4 and at %2 distance between
                      n3 & n4, and at %3 distance between (m1, n1, n2, %1) and (m2, n3, n4,
                      %2).
 
 
Example
      
      To add a node from model ID = 1, node ID = 334567 to measure
        msr1:
msr1 AddNode "1 334567"
 Errors
      
      Returns 0 if successful, otherwise an error code.