BuildPlus reports any duplicate module headers for CAD or CLD or ladder files so the correct entries may be selected for the build:
Modules that are unique have been placed in the final selection list on the right-hand pane. The duplicate modules that need to be resolved are listed at the bottom of the dialog box, with the choices listed in the left-hand pane. (Files are grouped together based on a common root directory and are displayed in a treeview.)
Once the correct selections are made, this dialog will no longer appear, and the final selections can be viewed within the Wizard.