Dear Derek, That was quick and helpful, thank you. It was b), the currency. I would never have thought of that. Thanks again, István -- View this message in context: http://gnucash.1415818.n4.nabble.com/Unable-to-post-bills-invoices-tp4369066p4370741.html Sent from the GnuCash - User mailing list archive at Nabble.com.