Bug 193231 RCP designer does not display Preview tab and View menu.
On RCP designer, Preview tab is missing and View Report menus. Please check the attached screen shot for detail.
viewer/org.eclipse.birt.report.viewer/src/org/eclipse/birt/report/viewer/utilities/ViewerClassPathHelper.java
}
			finally
			{
				if ( is != null )
					is.close( );
			}
		}
		catch ( IOException e )
		{
			
		}
		return props;
	}
	/**
	 * Set workspace classpath
	 */
	public static void setWorkspaceClassPath( )
	{
		
		IWorkspaceClasspathFinder finder = new WorkspaceClasspathFinder();
		WorkspaceClasspathManager.registerClassPathFinder( finder );
		
		
		String projectClassPaths = WorkspaceClasspathManager.getClassPath( );
		if ( projectClassPaths == null )
			projectClassPaths = ""; 
		System.setProperty( WORKSPACE_CLASSPATH_KEY, projectClassPaths );
	}
}