Hello everyone, I was running GLM in SAS with some simple data (35 subjects with a total of 1632 observations). The model is as follows: PROC GLM data=diab1; CLASS subject condit; MODEL F=subject condit subject*cindit/APHA=0.05; RANDON sunject subject*condit/TEST LSMEANS condit/STDERR PDIFF E=subjtec*condit; RUN But somehow, when calculate LSMEANS, one condition showed "Non-est". I am not sure what was going on. Could you please help? Please reply to my email at [EMAIL PROTECTED] Thanks, Corky Sent via Deja.com http://www.deja.com/ Before you buy. =========================================================================== This list is open to everyone. Occasionally, less thoughtful people send inappropriate messages. Please DO NOT COMPLAIN TO THE POSTMASTER about these messages because the postmaster has no way of controlling them, and excessive complaints will result in termination of the list. For information about this list, including information about the problem of inappropriate messages and information about how to unsubscribe, please see the web page at http://jse.stat.ncsu.edu/ ===========================================================================