search for: tp4270557p4270557

...fdist), fixed=a+b~1, random=a+b~1|nwfid, start=c(a=300,b=0.016)) Any help would be greatly appreciated. If it is helpful I can add in some of the code I have tried and the resulting error messages. Lynn -- View this message in context: http://r.789695.n4.nabble.com/Bootstrapping-nlme-models-tp4270557p4270557.html Sent from the R help mailing list archive at Nabble.com.