I am really strugling trying to use the closed corner command for a basic sheet metal part. I started with a basic .06 thick block, added .5 flanges to 2 perpendicular corners and now I want to close that corner in. I read the help that is in UG and it seems simple, but for some reason it won't let me pick anything. Not a single thin in the model can be picked for the closed corner command. I am using NX 4.