public void addException( Throwable ex )
public void addException( BirtException ex )
	public void addException( Throwable ex )	{		StringBuffer errMsg = new StringBuffer( );		// Loops to add the error messages except those system-defined		// exceptions. Skip redundant message.		String lastMessage = "";		String currentMessage = null;		do		{		    currentMessage =  ex.getLocalizedMessage( );		    // skip redundant messages		    if ( !currentMessage.equals( lastMessage ) )		    {		        lastMessage = currentMessage;		        errMsg.append( currentMessage );		        errMsg.append( (char) Character.LINE_SEPARATOR );		    }			ex = ex.getCause( );		} while ( ex != null				&& !ex.getClass( ).getName( ).startsWith( "java.lang" )				);//$NON-NLS-1$			addErrorMsg( errMsg.toString( ) );	}