Product Documentation
Virtuoso Space-based Router Constraint Reference
Product Version IC23.1, June 2023

Constraint Parameters

You can set constraint parameters to specify additional qualifiers for applying the constraint. For example, the distance parameter for the minimum adjacent via constraint indicates that the constraint applies only if the adjacent via is within the specified distance to the object.

Constraint Parameters Setting

Use the set_constraint_parameter command to add a parameter to a constraint or to change the value of an existing constraint parameter.

You must issue one command for each constraint parameter, followed by a set_constraint, set_layer_constraint, set_layerpair_constraint, or set_layerarray_constraint command to associate the parameters with a constraint. If any errors occur with any of the commands in this process, the pending constraint addition or change, and any constraint parameters are lost and the entire command sequence must be redone.

The order of constraint parameters is not significant. If a constraint requires more than one parameter, any parameter can be set first, as long as all are specified before the command is issued to set the constraint.

Related Topics

Constraint Definitions

Constraint Groups and Multispecs


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