Hi,
I noticed that Gretl doesn't complain if I wrongly write:
set csv_read_na = "."
Instead (as 'set' shows) it just uses the "=" character and ignores the
rest of the line, with fatal (but predictable) implications e.g. for 
'join'. Maybe it should throw an error if it is getting an unquoted 
string, or if it is getting something unexpected at the end.
Furthermore, if I write
set csv_read_na "."
(i.e. without the equal sign), it takes literally the three-character 
thing \".\" (quote dot quote) instead of just the dot.
So quoted strings seem taboo here, which I find slightly worrying (and 
took me a while to figure out the error).
cheers,
sven