[Gretl-users] smpl in a function

Hi all, I'm writing a script to implement the cointegration-with-break tests in Davidson & Monticini (2010). The part I've done so far is what they call the "incremental" version. Basically test for CI over subsamples, with the ending date increasing by one each time. The following block works fine in my main script: <hansl> # forward incremental begdate = firstobs(y) enddate = t0 loop while enddate<=n --quiet smpl begdate enddate ols y 0 time x --quiet z = $uhat coeffs[enddate,] = $coeff' stderrs[enddate,] = $stderr' adf 2 z --ct --test-down --quiet stats[enddate] = $test enddate++ endloop </hansl> But when I try to put this in a function, the smpl command generates an error: Bad character 'b' in date string error in new starting obs *** error in function minmin The variables 'begdate' & 'enddate' are getting set properly. I'm using the shapshot built on 7/7, windows 7. Any thoughts? TIA, PS