[Gretl-users] join error

Good morning; I'm working on a script that import data from several sources (mainly a sql database and a bunch of csv files) to get a single dataset where to do some analysis. I have a problem with a join that gives me an error and I can't figure out why. The join # Join the italian population by age classes, matching the proper age class in the dataset ? join /home/ale/Documenti/Univpm/IEB/Master_Thesis/popolazione/italia11.csv \ MaschiIta --data=Maschi --filter="Eta<999" --ikey=Eta Data appended OK goes smooth as the output says; while the join ? join /home/ale/altit.csv Altit --ikey=CodiceComune Data error Error executing script: halting gives me that error. The joins are supposed to work in the same way, that is match 1 value from the right hand dataset with n values in the inner dataset. Really, I have no clue about it. Thanks. -- Alessandro Astuti