I have a problem where NONMEM is declining to do the simulation step - saying the parameter estimates aren't good enough. Is it possible to tell NONMEM to go ahead and do simulation anyway, I don't see anything in the documentatin (like the UNCOND option for $COV) thanks Mark Mark Sale MD President, Next Level Solutions, LLC www.NextLevelSolns.com 919-846-9185 A carbon-neutral company See our real time solar energy production at: http://enlighten.enphaseenergy.com/public/systems/aSDz2458