On Sun, 6 Mar 2011, Henrique Andrade wrote: Gretl's behavior has been that if the user has specified what looks like a filename extension on saving a file, the program doesn't append a further extension. So, to save a file with a name such as "foo-2.5.gdt" you'd have to type the full name, including the ".gdt" part. However, plain numbers are arguably not proper "extensions" -- or at least, not when saving standard gretl file types. I've now modified things in CVS and the snapshots: in case a file type has a canonical extension, we'll always append it unless the user has already done so. Allin