I am trying to model a cradle to gate LCA for a simple Gas Metal Arc Welding process. I created the process with inputs and outputs and the product system for it. The inputs are electricity mix and steel rebar (unfortunately there is no steel wire in the ELCS database), but I can only add the corresponding steel rebar process to the product System. (Right click on the welding process and then "Build supply chain" and "complete"). But for the flow "electricity, low voltage, production UCTE, at grid" no process is created. What can I do add the corresponding process?