[Gretl-users] Data Handling Problems (Mac OS/X)

Hi people! 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).gdo~: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