Hello!

Has anyone seen such problem that edge flange disappears in flat pattern?

I have attached a SW2015 file in which I have a hole in a constant radius sheet metal part and on one edge of that hole is a tongue which is bent to something lika a spring.

When I apply flat pattern, the hole remains nicely where it should be but the bent tongue (spring) disappears.

I tried to make the tongue (spring) in similar way as the base flange 1 in the file is done and combined the parts but it still dissapears in flat view.

Has anyone some idea what is wrong or how could I have the flat  tongue (spring) in flat view  (automatically not manually )?