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
if ((members[i].getType() & resourceType) > 0) {
                            results.add(members[i]);
                        }
                    }
                    return results.toArray();
                } else {
                    
                    if (o instanceof ArrayList) {
                        return ((ArrayList) o).toArray();
                    } else {
                        return new Object[0];
                    }
                }
            }
        };
    }
    /**
     * Returns this page's collection of currently-specified resources to be 
     * exported. This is the primary resource selection facility accessor for 
     * subclasses.
     *
     * @return a collection of resources currently selected 
     * for export (element type: <code>IResource</code>)
     */
    protected List getSelectedResources() {
        Iterator resourcesToExportIterator = this
                .getSelectedResourcesIterator();
        List resourcesToExport = new ArrayList();
        while (resourcesToExportIterator.hasNext())