Bug 145520 Group name will not show up in group list if the group use default name and key expression has no value
Description: Group name will not show up in group list if key expression has no value. Steps to reproduce: 1. Insert a table into report, bind it to a data set 2. Switch to property editor -> groups 3. Click on add button to open new group dialog, then press ok button Expected result: A new group with default name will be added to group list Actual result: A new group is added to group list, but without group name. But when let group tab lost focus and get focus again, you can see the group name.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/core/Module.java
exceptionList.add( ex );
			throw new DesignFileException( libraryFileName, exceptionList );
		}
	}
	/**
	 * Loads library with given library file name. This method will add library
	 * into this module even if the library file is not found or has fatal
	 * error.
	 * 
	 * @param includeLibrary
	 *            library file name
	 * @see #loadLibrary(String, String)
	 */
	public void loadLibrarySilently( IncludedLibrary includeLibrary )
	{
		try
		{
			Library library = loadLibrary( includeLibrary.getFileName( ),
					includeLibrary.getNamespace( ) );
			library.setReadOnly( );
			libraries.add( library );
		}
		catch ( DesignFileException e )
		{
			Exception fatalException = ModelUtil.getFirstFatalException( e
					.getExceptionList( ) );
			Library library = new Library( session, this );
			library.setFatalException( fatalException );
			library.setFileName( includeLibrary.getFileName( ) );
			library.setNamespace( includeLibrary.getNamespace( ) );