Hi, importing a zolca file (i.e., a database) into another database, as you do when you add LCIA methods to a database, takes time, since all the references are checked. The time needed does not so much depend on computer power but rather on the disc speed, an SSD is faster than a traditional harddisc. It can take 20 minutes, also depending on the size of the database you are importing into; ELCD is one of the larger databases. Give it some time therefore please. Hth.