cadkiller,
Thanks for your reply. It helped, But now I have a joint problem. I should have mentioned initially that the column and wall are attached at the back of the column with a 45 degree angle so the end of the wall is notched to form the corner of the column. Right now when I unjoin as per your reply, the wall is shown inside the column with the wall hatch. however, the column hatch is fine now. Any other thing I should click ?
Thanks again