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.engine/src/org/eclipse/birt/chart/model/data/DataPackage.java
* @generated
		 */
		EAttribute ACTION__TYPE = eINSTANCE.getAction_Type( );
		/**
		 * The meta object literal for the '<em><b>Value</b></em>' containment reference feature.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		EReference ACTION__VALUE = eINSTANCE.getAction_Value( );
		/**
		 * The meta object literal for the '{@link org.eclipse.birt.chart.model.data.impl.BaseSampleDataImpl <em>Base Sample Data</em>}' class.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @see org.eclipse.birt.chart.model.data.impl.BaseSampleDataImpl
		 * @see org.eclipse.birt.chart.model.data.impl.DataPackageImpl#getBaseSampleData()
		 * @generated
		 */
		EClass BASE_SAMPLE_DATA = eINSTANCE.getBaseSampleData( );
		/**
		 * The meta object literal for the '<em><b>Data Set Representation</b></em>' attribute feature.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->
		 * @generated
		 */
		EAttribute BASE_SAMPLE_DATA__DATA_SET_REPRESENTATION = eINSTANCE.getBaseSampleData_DataSetRepresentation( );
		/**
		 * The meta object literal for the '{@link org.eclipse.birt.chart.model.data.impl.DataElementImpl <em>Element</em>}' class.
		 * <!-- begin-user-doc -->
		 * <!-- end-user-doc -->