[Gretl-devel] seasonal / periodic dummies in panel data

Hi, I have a panel dataset which is monthly in the time dimension, and I have done: setobs 12 1991:1 --panel-time which is recognized as the subsequent invocation of '$obsdate' shows. However, the menu item "add/periodic dummies" is greyed out. Any reason for that? Also, the seasonals() function gives strange error messages; here's an example script: <hansl> open abdata.gdt setobs 4 1900:1 --panel-time # just an example series seas = seasonals(1) </hansl> thanks, sven