When RCPTT Maven plugin runs tests, it copies project contents to "target" folder. Therefore, after running tests with maven locally and refreshing project in RCPTT IDE would produce a lot of errors related to duplicate resource IDs. 

To workaround this, it is recommended to add a resource filter in RCPTT project:

  1. Right-click project and select Properties
  3. Open Resource -> Filters property page
  5. Click Add... to add a new filter    
    • Filter type: Exclude all
    • Applies to: Folders
    • File and folder attributes: Name matches target
  6. Apply changes, wait for a workspace refresh
  8. If  Problems view still shows duplicate ID errors, select Project -> Clean in main menu and clean all projects