Please I need a help. I am learning Solidworks 2006. I have a problem with compatibility with Solidworks 2004. When I make some parts or assembly in vers.2006 and send them to my friend he can not open those files.His Solidworks 2004 is writing :there are no configuration data. Is this a normal ??? Could you help me please to make compatible both versions. I think that should have to work !!!???