addInstance Adds a new instance of a subform or subform set to the form model. Syntax Reference_Syntax.addInstance( BOOLEAN param ) Parameters param (Optional) Indicates if the new subform or subform set has a corresponding data value in the data model. • true | 1 (JavaScript) or 1 (FormCalc)(default) Merge the new subform or subform set with the data model. • false | 0 (JavaScript) or 0 (FormCalc) Do not perform a merge operation. Returns The new form object, or null if no object was added. Applies to Model Object Form Model instanceManager Version XFA 2.1 Examples JavaScript Subform1.instanceManager.addInstance(1); FormCalc Subform1.instanceManager.addInstance(1)