Of course the really annoying thing is that this particular problem runs fine in lme() ;) David Duffy. (PS. though not using other packages eg Karin Meyer's WOMBAT using PX-EM or AIREML)
| David Duffy (MBBS PhD) ,-_|\ | email: davidD at qimr.edu.au ph: INT+61+7+3362-0217 fax: -0101 / * | Epidemiology Unit, Queensland Institute of Medical Research \_,-._/ | 300 Herston Rd, Brisbane, Queensland 4029, Australia GPG 4D0B994A v