Dear Matthew, Thanks for your interest in Clarify. The issue you identified is not a bug; it is a safeguard, designed to prevent you from losing your work. Stata cannot keep multiple data datasets in memory at the same time. This means that the program cannot load one (imputed) dataset without clearing another. If you need to make multiple calls to estsimp and are using multiply imputed datasets, you will have to clear the memory manually between each call. For example: * First call to estsimp use mydata1, clear estsimp ..., mi(mydata) * Second call to estsimp (must clear memory and reload data) use mydata1, clear estsimp ..., mi(mydata) Note that you do not need to dropsims. the "clear" option drops everything, including the simulated parameters. Hope this helps Regards Mike Tomz Michael Tomz, Assistant Professor Phone: 650-725-4031 Department of Political Science Fax: 650-745-2765 Encina Hall, Stanford University tomz(a)stanford.edu Stanford, CA 94305-6044 On Mon, 28 Apr 2003, Matthew Vile wrote: -- Clarify mailing list served by Harvard-MIT Data Center [Un]Subscribe/View Archive: http://lists.hmdc.harvard.edu/?info=clarify