COMSOL 6.2 - Dynamic Nodes in the Model Builder

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The Model Builder is a dynamic environment. As your model is built and analyzed, there are numerous ways to quickly identify nodes that change status during the process. Table 3-4 lists generic examples and links to the dynamic visual aids that are used to help you.

Icon	Type	Node Example and Link to More information (where applicable)
	Error	For example, on a Material node . See Errors Relating to the Material Nodes.
	Error node	Errors and Warnings
	Current node, not built (yellow frame)	For example, on a Geometry node (). This node is also displaying the asterisk indicating the node is being edited. The asterisk also appears on plot nodes when the plot has not been updated to reflect changes in the data or settings (for example, after re-solving), See The Current Node in Geometry Sequences.
	Current node (green frame)	A current node is used for Geometry and Meshing nodes and indicates that the feature or sequence of steps has been built. It is a green line on the left and upper edges of the node. For example, on a Geometry node , after building. Also see The Current Node in Geometry Sequences.
	Enabled sequence	During solution processing, the particular sequence that is enabled and runs when selecting Compute has a green border around its icon (). See Computing a Solution.
	Harmonic Perturbation	For example, on a boundary level node for the Electric Currents interface, Electric Ground node . See Harmonic Perturbation, Prestressed Analysis, and Small-Signal Analysis.
	Warning	For example, on a Mesh node .
	Editing, or in process of editing, a node	For example, on a Mesh node . This node is also displaying the asterisk indicating the node is being Edited. Also indicates physics interface nodes that have been disabled in a study step. See Editing and Building Geometry Nodes for Geometry nodes for example.
	Pairs	For example, on a 3D Boundary Level node . See Identity and Contact Pairs.
	Pairs — Fallback Features	For example, on a 3D Boundary Level pair node . See Identity and Contact Pairs.
	Contributing node	For example, on a 3D boundary level node . See Physics Exclusive and Contributing Node Types and Physics Node Status.
	Default node	For example, on a 2D boundary level node . See Physics Interface Default Nodes.
	Override	For example, on a 3D boundary level node . See Physics Exclusive and Contributing Node Types.
	Overridden	For example, on a 3D boundary level node . See Physics Exclusive and Contributing Node Types
Study Steps Analysis
	Solve For	For example, a Laminar Flow interface where the green dot in the lower-right corner indicates that the study solves for the degrees of freedom in this physics interface. See Physics and Variables Selection.
	Disable in Solvers	For example, a Laminar Flow interface is enabled (not dimmed), shows that the study step provides degrees of freedom (the yellow dot in the lower-right corner), and has a change of state indicated by the asterisk. The yellow dot means that the study step provides degrees of freedom but does not solve for the physics interface. See Physics and Variables Selection.
	Change of State (editing)	An asterisk appears in the upper-right corner of nodes for which you change their state in the study step’s selection tree compared to their state in the main model tree in the Model Builder. For example, for the Joule Heating interface .
	Disabled in Model (provides no degrees of freedom) and shows a change of state	In this example, a Transport in Diluted Species interface is disabled (unavailable), provides no degrees of freedom (red dot in the lower-right corner), and has a change of state indicated by the asterisk. See Physics and Variables Selection.
Load and Constraint Groups
	Load Group	This is an example of a Boundary Load node with a load group . This is for a 2D model at the boundary level. See Load Group and Using Load Cases.
	Constraint Group	This is an example of a Fixed Constraint node with a constraint group . This is for a 2D model at the boundary level. See Constraint Group and Using Load Cases.