however when i select the vertices i need to detach and select "separate" under Mesh nothing happens and it tells me "Cylinder1 (name of my object) has only one piece, ignored"
Sorry miss read your post, you need to be in edge mode and make sure you have all the edges going round the box selected. if done correctly in face mode marque the top half and move up, the top half should move without moving the bottom part...........dave
That's what I did, im not selecting the vertices but the edges. I'm selecting all the edges that i need to detach, but it wont work when i attempt to seperate
Hmm, that's odd. You could try exporting your object as an obj then reimporting it into a new scene and see if you can then detach it. Also try selecting all the faces that make up the lid and going to mesh > seperate, then select the two pieces and go to mesh > combine. This should give you the same outcome.
Just zip the .mb or .ma scene file and add as an attachment to your reply
I took a quick look at the tut. At about 10:00 the instructor selects the edge and does a "detach component". At about 11:30 he selects the object and does a "separate".