Bug 177864 Error message is not helpful when a BIRT function call has incorrect params
The attached report design contains a single data iten with expression BirtComp.like("a"). This expression has syntax error because BirtComp.like() function expects two parameters. Run this report in BIRT viewer and the only error you will get is: org.eclipse.birt.report.service.api.ReportServiceException: Error happened while running the report This error message is not helpful. It should have pointed to the source of the report design error, and has an exception call stack.
viewer/org.eclipse.birt.report.viewer/birt/WEB-INF/classes/org/eclipse/birt/report/service/ReportEngineService.java
* @param locale
	 * @param rtl
	 * @deprecated
	 * @throws RemoteException
	 */
	public void renderReportlet( OutputStream os, HttpServletRequest request,
			IReportDocument reportDocument, String reportletId,
			boolean masterPage, boolean svgFlag, List activeIds, Locale locale,
			boolean rtl ) throws RemoteException
	{
		renderReportlet( os, request, reportDocument, reportletId, null,
				masterPage, svgFlag, activeIds, locale, rtl, null );
	}
	/**
	 * Render reportlet page.
	 * 
	 * @param os
	 * @param request
	 * @param reportDocument
	 * @param reportletId
	 * @param masterPage
	 * @param pageNumber
	 * @param svgFlag
	 * @param activeIds
	 * @param locale
	 * @param rtl
	 * @param iServletPath
	 * @deprecated
	 * @throws RemoteException
	 */