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/WizardResourceImportPage.java
* Sets the initial contents of the container name field.
     */
    protected final void initialPopulateContainerField() {
        if (initialContainerFieldValue != null)
            containerNameField.setText(initialContainerFieldValue);
        else if (currentResourceSelection != null)
            containerNameField.setText(currentResourceSelection.getFullPath()
                    .makeRelative().toString());
    }
    /**
     * Set all of the selections in the selection group to value
     * @param value boolean
     */
    protected void setAllSelections(boolean value) {
        selectionGroup.setAllSelections(value);
    }
    /**
     * Sets the value of this page's container resource field, or stores
     * it for future use if this page's controls do not exist yet.
     *
     * @param value String
     */
    public void setContainerFieldValue(String value) {
        if (containerNameField == null)
            initialContainerFieldValue = value;
        else
            containerNameField.setText(value);
    }
    /**
     * Update the tree to only select those elements that match the selected types.