On Mon, 29 Jun 2020, Sven Schreiber wrote:
 Hi,
 I've noticed this behavior, perhaps Windows-specific:
 ? eval @gretldir
> C:
 Das Symbol 'C' ist nicht definiert  # [undefined]
 ? eval $gretldir
 C:\Program Files\gretl
 ?
 I would have expected @gretldir to either work, or to return an empty
 string, or to throw an error, but not this problem. Maybe some backslash
 trouble? 
Actually the first result should be expected. "@" does string 
substitution, and after substiitution has been done the input line 
line reads
eval C:\Program Files\gretl
To get the effect you apparently expected you'd need to do
eval "@gretldir"
Allin