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
* <!-- begin-user-doc -->
	 * <!-- end-user-doc -->
	 * @return whether the value of the '<em>Interval</em>' attribute is set.
	 * @see #unsetInterval()
	 * @see #getInterval()
	 * @see #setInterval(int)
	 * @generated
	 */
	boolean isSetInterval( );
	/**
	 * Returns the value of the '<em><b>Marker Lines</b></em>' containment reference list.
	 * The list contents are of type {@link org.eclipse.birt.chart.model.component.MarkerLine}.
	 * <!-- begin-user-doc --> <!-- end-user-doc -->
	 * <!-- begin-model-doc -->
	 * 
	 * 					Defines a set of markers for positions on the axis scale displayed as lines across the plot at those locations.
	 * 					
	 * <!-- end-model-doc -->
	 * @return the value of the '<em>Marker Lines</em>' containment reference list.
	 * @see org.eclipse.birt.chart.model.component.ComponentPackage#getAxis_MarkerLines()
	 * @model type="org.eclipse.birt.chart.model.component.MarkerLine" containment="true" resolveProxies="false"
	 *        extendedMetaData="kind='element' name='MarkerLines'"
	 * @generated
	 */
	EList getMarkerLines( );
	/**
	 * Returns the value of the '<em><b>Marker Ranges</b></em>' containment reference list. The list contents are
	 * of type {@link org.eclipse.birt.chart.model.component.MarkerRange}. <!-- begin-user-doc --> <!-- end-user-doc
	 * --> <!-- begin-model-doc -->
	 *