I have been trying to get assembly sketch entities to export into any type of neutral file but unable to do. I think there is an option in IGES where there is a button for curves but they do not export.
I dont think there is any way. but i want 2 share my trick with u.
Well open that assy and insert a new part in the assy (just like we work in top down design). Now convert all the skecthes u want to copy in that part using sketch convert entity command.
Now open that part and break/remove all the external references and save it.