Bug 148761 Unable to copy a report item from template to report
Steps: 1. Create a template, add a Text item "t1" or others 2. Create template item using "t1" 3. Double click the template item and we get a report item again. 4. We copy the item, paste to another report file. Expected: the text item can be copied. Actual result: Nothing happened, not copied and no error msg.
model/org.eclipse.birt.report.model/src/org/eclipse/birt/report/model/metadata/SlotDefn.java
}
		}
		return contentsWithExtensions;
	}
	/**
	 * Builds the semantic information for the slot.
	 * 
	 * @throws MetaDataException
	 *             if any violation occurs during build of the slot.
	 */
	protected void build( ) throws MetaDataException
	{
		if ( contentTypes.isEmpty( ) )
			throw new MetaDataException( new String[]{this.name},
					MetaDataException.DESIGN_EXCEPTION_MISSING_SLOT_TYPE );
		
		
		if ( displayNameID == null )
			throw new MetaDataException( new String[]{name},
					MetaDataException.DESIGN_EXCEPTION_MISSING_SLOT_NAME );
		
		MetaDataDictionary dd = MetaDataDictionary.getInstance( );
		contentElements.clear( );
		Iterator iter = contentTypes.iterator( );
		while ( iter.hasNext( ) )
		{
			String name = (String) iter.next( );
			ElementDefn type = (ElementDefn) dd.getElement( name );
			if ( type == null )
				throw new MetaDataException( new String[]{this.name, name},