Hi, Ignacio,

4) but from the GUI, opening the file through '/File/Open data/User file' I obtain the error

xmlParseFile failed on /home/ignacio/gretl/file.dat

If I call the gui from a terminal, gretl is reporting this error on the terminal screen:

/home/ignacio/gretl/file.dat:1: parser error : Start tag expected, '<' not found
xt yt
^

Some how Gretl is clever (in the other ways to open the file), to do an Import before presenting data to us. You cannot open in GUI a non Gretl file (only if you can import it).

Going with the GUI, you /File/Open data/Import/text_CVS the file opens correctly.

In my OpenSUSE 12.2 64bit, I cannot even list the file in the Open User file menu, because is not .gdt.

I did rename the file to file.gdt and observed the same error you got.

Best Regards,

Hélio Guilherme

(on my first day of unemployment :( )