http://www.zwsoft.com/forum/viewthread.php?tid=2438 Hai * I wanted to lock certain entities or block object.So, such entities should not be edited by the engineers. Is there is any option available in ZWCAD 2010?. *we are scrutiny the reactor objects in autolisp. *Please give the positive solution as soon as possible sathiyanathan 2012-09-20 17:02:53