I have clicked the "Scan" button several times to no effect. Still zero volume shown.
We have entered the available quantity for our items via Transactions -> Inventory Adjustment after they have all been created in the Inventory -> Items menu. The price has been set in the items details view as well.
I have added a few items via the purchase transaction and it now shows some nonzero value in the report. Should we turn every inventory adjustment transaction into a purchase to have this work? Will the calculated volume for the warehouse be still correct after an inventory adjustment transaction after purchase?
What we want is just an overview of available items, and the appropriate warehouse stock value. Most transactions will be inventory corrections and warehouse transfers, since we aren't selling that much.
Sorry for the confusion. We should have probably tested this before entering a large amount of data. :-)