No you do not need to enter a reference number, we only need to know the end date of your maintenance since you will take this over to the openLCA ecoinvent licence (it determines which versions of ecoinvent you can get access to). And yes, you need to pay a fee (which compensates our effort for the conversion; if you buy directly from Nexus, the prices are the same as if you buy from ecoinvent).
Hth, Andreas
- the tag Collaboration Server does not fit, right?