I'm trying to perform a Monte Carlo Simulation with a process built in the USLCI database, but the calculation window won't allow it as an option.
I added uncertainty to flows in the process by importing the Ciroth et al data quality system for flows. Then I use the pedigree matrix to create an uncertainty distribution.
When I create a product system and click on "Calculate," the option to perform a Monte Carlo is unavailable (grey text).
How do I get the calculation setup to allow MC simulations? Am I missing a step somewhere? I'm more familiar with ecoinvent where the functionality is built in, so maybe there's some edit I need to make to the USLCI database.
For reference on versions: openLCA 2.3.0, USLCI 1.2024-10.0
