Hello Gretl folks, greetings from Paris ! Now returning to GRETL, for (I hope) a while, I have a minor report to submit. I am currently preparing data for a cross-section demand system estimation (AIDS or QAIDS stuff) on a large survey file (~10.000 observations). To avoid clumsy and repetitive (and error prone) action, I decided to use the gretl variable list concept. However, one I haved defined my list and I want to do computations, gretl manifested the following minor problem: When I use the following script: list ALL = dataset list NON_DEP = 1 2 237 238 239 240 241 242 243 list DEP = ALL - NON_DEP nel = nelem(DEP) series DEPTOT = sum(DEP) gretl says: argument should be series, is list, but it seems ok on the manual, chapter 11 on lists and computations. However, when I try this dirty little trick: list ALL = dataset list NON_DEP = 1 2 237 238 239 240 241 242 243 list DEP = ALL - NON_DEP nel = nelem(DEP) series DEPTOT = mean(DEP)*235 all runs smooth and well ! Well, it's ok for me, but looks like a minor bug nope ? cheers Franck -- Franck Nadaud CIRED UMR 8568 CNRS - EHESS, ENPC, ENGREF, CIRAD 45 bis avenue de la Belle Gabrielle 94736 Nogent-sur-Marne Cedex TEL: 33-1-43-94-73-94 FAX: 33-1-43-94-73-70 MOB: 06-07-39-92-75 France