[Gretl-users] problem (or bug?) with loop and strings

Hey all, I've got a problem with the following example. I want to run loop "j" over different samples where the starting date and ending date are given by strings (from @temp to @last). If you run this loop "j" separately it works, but embedding it into the loop "i" does give the error message: "Data types not conformable for operation". <hansl> open australia sprintf first "%s", obslabel($t1) sprintf temp "%s", obslabel($t1+2) sprintf last "%s", obslabel($t2) printf "Full sample: @first to @last.\n" scalar rep = 10 loop i=1..rep smpl @first @temp loop j=@temp..@last scalar x=0 smpl ; +1 x=x+1 endloop endloop <\hansl> I cannot figure out the problem here. Best, Artur