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
this.resourceGroup.initialCheckListItem(currentResource);
            else
                this.resourceGroup.initialCheckTreeItem(currentResource);
        }
    }
    /**
     * Update the tree to only select those elements that match the selected types
     */
    private void setupSelectionsBasedOnSelectedTypes() {
        Runnable runnable = new Runnable() {
            public void run() {
                Map selectionMap = new Hashtable();
                
                Iterator resourceIterator = resourceGroup
                        .getAllWhiteCheckedItems().iterator();
                while (resourceIterator.hasNext()) {
                    
                    IResource resource = (IResource) resourceIterator.next();
                    if (resource.getType() == IResource.FILE) {
                        if (hasExportableExtension(resource.getName())) {
                            List resourceList = new ArrayList();
                            IContainer parent = resource.getParent();
                            if (selectionMap.containsKey(parent))
                                resourceList = (List) selectionMap.get(parent);
                            resourceList.add(resource);
                            selectionMap.put(parent, resourceList);
                        }
                    } else
                        setupSelectionsBasedOnSelectedTypes(selectionMap,
                                (IContainer) resource);