[amelia] Error using imputed data with Clarify

Hello, I am trying to use imputed data with Clarify, but I am getting an error message in Stata that says "Obs. nos. out of range" when it tries to simulate sigma-squared. Here is what Stata is telling me: . clear . use imp1 . estsimp reg y x1 x2 x3 x4 x5 x6, mi(imp) Estimation number : 1 of 5 Dataset being used: imp1 Simulating main parameters. Please wait.... % of simulations completed: 14% 28% 42% 57% 71% 85% 100% Simulating sigma-squared. Please wait Obs. nos. out of range r(198); . Any suggestions on what might be happening and how to fix it? Thanks! Strom -- Strom C. Thacker Susan Louise Dyer Peace Fellow Hoover Institution Stanford University Stanford, CA 94305-6010 650-725-3432 650-723-1687 (fax) sthacker(a)bu.edu http://www.bu.edu/sthacker