I'm trying to modify a .gdt file (deleting some series and including the first difference in the others). Everything works fine, but when I try to save the changes gretl shows me the message:

/Users/henrique/gretl/Base de Dados (Dissertação).gdt~:Illegal byte sequence

    But when I change the names of the files (without any Portuguese-Brazilian symbols, like "ç" or "~") it works fine. What's wrong? Does gretl doesn't accept signs?

Best,
Henrique