LabVIEW 2013 and previous versions of LabVIEW were inconsistent in what happened to the default value of an instance when changes were made to its type definition – sometimes the default value of an instance was overwritten and sometimes it was preserved.
In LabVIEW 2014, in most cases the default values of each instance of a type definition are automatically preserved. When an instance can’t be automatically updated (for example, when a type-defined string control is changed to an enum), LabVIEW breaks the VI and dims the instance so you can right click on the element and open the new “Review and Update from Type Def.” dialog box. This will allow you to make sure you don’t lose track of a default value you have already customized.
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