Bug 163018 An error extension will lead the report contain chart can't be opened and can not new a report.
Details: An error extension will lead the report contain chart can't open In org.eclipse.birt.report.tests.model has an error extension. When run the birt use workbenck, the report contain chart can't be opened and it can not new a report.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/metadata/ObjectDefn.java
{
	/**
	 * The internal name for the object. This is separate from the display name
	 * shown to users. It is usually the same as the element used to describe
	 * the item in XML.