Bug 152300 Model api is wrong.
In the LibrarCommand class,the method reloadLibrary , code lije this: activityStack.commit( ); // clears the activity stack to avoid potential problems. activityStack.flush( ); LibraryReloadedEvent event = new LibraryReloadedEvent( module .getLibraryByLocation( url.toExternalForm( ) ) ); module.broadcast( event ); Please first fire model event,then fire the commandstack event.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/command/LibraryCommand.java
* 
	 * @throws PropertyValueException
	 */
	private void removeIncludeLibrary( String fileName, String namespace )
			throws PropertyValueException
	{
		assert fileName != null;
		assert namespace != null;
		List includeLibraries = module.getIncludedLibraries( );
		Iterator iter = includeLibraries.iterator( );
		while ( iter.hasNext( ) )
		{
			IncludedLibrary includeLibrary = (IncludedLibrary) iter.next( );
			if ( !namespace.equals( includeLibrary.getNamespace( ) ) )
				continue;
			if ( !fileName
					.endsWith( StringUtil
							.extractFileNameWithSuffix( includeLibrary
									.getFileName( ) ) ) )
				continue;
			ElementPropertyDefn propDefn = module
					.getPropertyDefn( Module.LIBRARIES_PROP );
			PropertyCommand propCommand = new PropertyCommand( module, module );
			propCommand.removeItem( new CachedMemberRef( propDefn ),
					includeLibrary );
			break;
		}
	}
}