Significant Figures Continuation

First, of all sorry about the last email, it somehow got sent before I could complete it. Hi, while running a KOKA model I came across an observation and would greatly appreciate it if someone helps me understand it. When using a SIG=3, the model converges, and provides lower and upper CI bounds. All the CI bounds are positive except Q and the CV% of all parameters are within 20 % (except Q). This suggests (correct me if I am wrong) that the data might not be rich enough for the model to calculate a precise value for Q so it gives a wider range? Now when I change the SIG=3 to SIG=4, the model converges but the CV% are very high and more importantly I get negative lower bounds for all the parameters. What does this suggest, that the model cannot get precise estimates now at the level of significance (of numbers) requested? Please advise. Regards Neil -- Indranil Bhattacharya -- Indranil Bhattacharya