+1 vote

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. 

in openLCA by (130 points)
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by (23.1k points)
What database are you using or how did you create your database? "Number of items" should always exist.

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