Bug 140620 Chart scripting errors are ignored
Write a chart with an invalid script, the execution simply ignores the script. This makes it difficult to debug scripting. The error message is also not precise and needs improvements.
chart/org.eclipse.birt.chart.ui.extension/src/org/eclipse/birt/chart/ui/swt/wizard/TaskSelectData.java
cmbDataSet.setEnabled( false );
			btnNewData.setEnabled( false );
			btnFilters.setEnabled( hasDataSet( )
					&& getDataServiceProvider( ).isInvokingSupported( ) );
			btnParameters.setEnabled( hasDataSet( )
					&& getDataServiceProvider( ).isInvokingSupported( ) );
			btnBinding.setEnabled( hasDataSet( )
					&& getDataServiceProvider( ).isInvokingSupported( ) );
		}
		else if ( e.getSource( ).equals( btnUseDataSet ) )
		{
			
			if ( !btnUseDataSet.getSelection( ) )
			{
				return;
			}
			cmbDataSet.removeAll( );
			cmbDataSet.add( BLANK_DATASET, 0 );
			String[] dataSets = getDataServiceProvider( ).getAllDataSets( );
			if ( dataSets != null )
				for ( int i = 0; i < dataSets.length; i++ )
				{
					cmbDataSet.add( dataSets[i], i + 1 );
				}
			cmbDataSet.select( 0 );
			cmbDataSet.setEnabled( true );
			btnNewData.setEnabled( getDataServiceProvider( ).isInvokingSupported( ) );
		}
		else if ( e.getSource( ).equals( cmbDataSet ) )
		{