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/component/Axis.java
* Defines a set of marker areas for a range of values on the axis displayed as filled rectangles extending across
	 * the plot between the start and end positions.
	 * 
	 * <!-- end-model-doc -->
	 * 
	 * @return the value of the '<em>Marker Ranges</em>' containment reference list.
	 * @see org.eclipse.birt.chart.model.component.ComponentPackage#getAxis_MarkerRanges()
	 * @model type="org.eclipse.birt.chart.model.component.MarkerRange" containment="true" resolveProxies="false"
	 * @generated
	 */
	EList getMarkerRanges( );
	/**
	 * Returns the value of the '<em><b>Triggers</b></em>' containment reference list.
	 * The list contents are of type {@link org.eclipse.birt.chart.model.data.Trigger}.
	 * <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * <!-- begin-model-doc -->
	 * 
	 * 					Holds the triggers for the axis.
	 * 					
	 * <!-- end-model-doc -->
	 * @return the value of the '<em>Triggers</em>' containment reference list.
	 * @see org.eclipse.birt.chart.model.component.ComponentPackage#getAxis_Triggers()
	 * @model type="org.eclipse.birt.chart.model.data.Trigger" containment="true" resolveProxies="false"
	 *        extendedMetaData="kind='element' name='Triggers'"
	 * @generated
	 */
	EList getTriggers( );
	/**
	 * Returns the value of the '<em><b>Major Grid</b></em>' containment reference. <!-- begin-user-doc --> <!--