Rpd not showing table column list in the properties window

Question

I am modeling my rpd but when I try to set the primary key by opening the properties window of my fact table, the keys tab does not list any columns- usually it will have a list of columns with check boxes and from there I designate the one I want to be my primary key. any suggestions on why the list is missing?

ForSly · Answer

thanks. I worked. I have a follow up question but will post it on a new thread.

ForSly · Answer

thanks. I will keep that in mind when asking questions in the future

[Deleted User] · Answer

Just for future usage: "12c" means pretty much nothing as there were almost 20 "12c" version so far.