The State node (

) is an attribute node that handles settings for state variables. A state is composed of a set of ODE variables. Each state has a separate
State node. This attribute is used together with the
Dependent Variables node.
The State Components section displays the variable names for the state components. Also, when internal extra variables are used, these are displayed here as
Internal Variables.
Use the Solve for this state checkbox to control whether to solve for the state or not. This setting is only available if the
Dependent Variables node’s setting
Defined by study step is set to
User defined. If the variable is not solved for, its values are determined by the settings in the
Values of Variables Not Solved For section of the corresponding
Dependent Variables operation node.
If this state is part of a physics for which a Model Reduction node is computing a reduced model that include reduction, you can choose a
Reduced Model node from the
Reconstruction list, if you want this state to use another reconstruction than the rest of the study. This setting is only available if the
Dependent Variables node’s setting
Defined by study step is set to
User defined and if the state is a dependent variable such as in an ODE.
Use the Store in output checkbox to control whether to store the variable in any output solution or not.