Hi, the author of the contributed package fcModels is Yi-Nung Yang. Not sure if he's still following this list - Yi-Nung, please make yourself heard if you're here. Having said that, I'm also getting similar errors when running the wes function from that package on the djclose data that's used in the package's sample script. It looks like a bug that perhaps has been there quite a while already. Looking at the code a bit and the argument label "number of years...", my suspicion is that the wes function is not really set up for daily datasets like djclose. Perhaps only annual, quarterly, and monthly periodicities are supported. Are you also working with daily data? Note that there are also two equally established packages "Holt" and "Winters" by gretl veteran Ignacio (Diaz-Emparanza). cheers sven Am 03.03.2026 um 08:45 schrieb ramakrishnasalagrama(a)gmail.com: > ? List04 = wes(Cement, 0, null, 1, 0.4, 0.03, 0.3, 2, 0) > Index value -1 is out of bounds > *** error within loop in function wes >> genr f[j+1]=(F[j] + m*T[j])*S[j+m-$pd] > > I am getting the above error while trying to estimate the holt-winters from fcModels. Any help? > > https://www.dropbox.com/scl/fi/nklcilb87qdtc2dm1klr6/aus_production_cemen... > _______________________________________________ > Gretl-users mailing list -- gretl-users(a)gretlml.univpm.it > To unsubscribe send an email to gretl-users-leave(a)gretlml.univpm.it > Website: https://gretlml.univpm.it/postorius/lists/gretl-users.gretlml.univpm.it/

Hi, Thanks for the fix. It's working now. @sven it is a quarterly data.