Limited number of reference flow properties

Question

Hi there. I apologize if this is a stupid question (i'm very new to openLCA). I am trying to create a new flow for a product (a coffee lid). I would like the reference flow property to be number of items, but I am only shown the reference properties shown in the image below. Does anyone know how I might be able to get number of items to show up here so I can select it for my reference flow property? Thanks so much. 

Comments

What database are you using or how did you create your database? "Number of items" should always exist.

Answer 1

Hello,

I have encountered this problem also, what could be the reason of "Number of items" not one of the options in the reference flow?

Kind regards