Bug 147407 Preview the attached report in the web viewer first time and then click the TOC button will cause NPE error
Description: It just can be reprouduced at first time preview. Step to reproduce: 1. please use attach report file 2. preview it in the web viewer 3. click the "Toggle table of contents" button Actual result: As the atteched screenshot shows,There is a NPE error.And if you preview it in the Web viewer again, the phenomenon is disappear.But reopen the eclipse and preview it at first time, it will be occured.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/utility/ParameterAccessor.java
public static final String PARAM_FORMAT_HTML = "html"; 
	/**
	 * Format parameter constants to display the report in pdf.
	 */
	public static final String PARAM_FORMAT_PDF = "pdf"; 
	/**
	 * URL parameter name that gives the locale.
	 */
	public static final String PARAM_LOCALE = "__locale"; 
	/**
	 * URL parameter name that determins to support the SVG or not.
	 */
	public static final String PARAM_SVG = "__svg"; 
	/**
	 * URL parameter name that gives the page number to display the report.
	 */
	public static final String PARAM_PAGE = "__page"; 
	/**
	 * URL parameter name that gives the report design name.
	 */
	public static final String PARAM_ISNULL = "__isnull"; 
	/**
	 * URL parameter name that determines to support masterpage or not.
	 */
	public static final String PARAM_MASTERPAGE = "__masterpage"; 
	/**
	 * URL parameter name that determines whether the BIRT application is
	 * running in the designer or standalone.
	 */
	public static final String PARAM_DESIGNER = "__designer";