To refresh tasks to reflect project changes
- Make changes to the project in the scheduling software, and save it. 
- Load your model into Autodesk Navisworks (see Open Files if you need help). 
- Click Home tab  Tools panel Tools panel TimeLiner TimeLiner , and click the Data Sources tab in the TimeLiner window. , and click the Data Sources tab in the TimeLiner window.
- Click the Refresh button and select Selected Data Sources or All Data Sources. 
- In the Refresh from Data Source Dialog Box select one of the following options and click OK. - Rebuild Task Hierarchy. Choose this to re-import all tasks and associated data from the selected project file(s), and rebuild the task hierarchy on the Tasks tab. 
- Synchronize. Choose this to update all existing tasks in the Tasks tab, with the latest associated data from the selected project file(s) (for example, Start and End dates). 
 
Tip: You can also right-click data source in the Data Sources tab and select the Synchronize or Rebuild Task Hierarchy option.