Bug 114648 export file system/archive wizard initally has error when no selection seeded
Make sure nothing is selected in your Navigator or Package Explorer. File > Import/Export Select Archive or File System BUG: there is initially an error - There are no resources currently selected for export. There should not initially be an error in these wizards.
bundles/org.eclipse.ui.ide/extensions/org/eclipse/ui/dialogs/WizardExportResourcesPage.java
} else {
                setupSelectionsBasedOnSelectedTypes(selectionMap,
                        (IContainer) resource);
            }
        }
        
        if (hasFiles)
            selectionMap.put(parent, selections);
    }
    /**
     * Save any editors that the user wants to save before export.
     * @return boolean if the save was successful.
     */
    protected boolean saveDirtyEditors() {
        return IDEWorkbenchPlugin.getDefault().getWorkbench().saveAllEditors(
                true);
    }
    
    /**
     * Check if widgets are enabled or disabled by a change in the dialog.
     */
    protected void updateWidgetEnablements() {
        boolean pageComplete = determinePageCompletion();
        setPageComplete(pageComplete);
        if (pageComplete)
            setMessage(null);
        super.updateWidgetEnablements();
    }
}