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/command/ExtendsCommand.java
if ( !metaData.canExtend( ) )
				return;
		}
		else
		{
			
			if ( !metaData.canExtend( ) )
				throw new ExtendsForbiddenException( element, base,
						ExtendsForbiddenException.DESIGN_EXCEPTION_CANT_EXTEND );
			ElementPropertyDefn propDefn = element
					.getPropertyDefn( IDesignElementModel.EXTENDS_PROP );
			try
			{
				retValue = (ElementRefValue) propDefn.validateValue( module,
						base );
			}
			catch ( PropertyValueException e )
			{
				assert false;
			}
		}
		
		doSetExtendsRefValue( retValue );
	}
	/**
	 * Does the work to set the new style with the given
	 * <code>newStyleValue</code>.
	 * 
	 * @param newStyleValue
	 *            the validated <code>ElementRefValue</code>