Hello I would like to use the transcan and impute functions from Hmisc library for single impution. library(Hmisc) m1<-data.frame(x1=rnorm(20),x2=rnorm(20),x3=rnorm(20)) m1[c(2,4),1]<-NA t1<-transcan(~x1+x2+x3,data=m1,imputed=T) impute(t1) Fehler in as.environment(pos) : kein Eintrag names "NA" im Suchpfad Which means: Error in as.environment(pos): no entry called 'NA' in search path. What am I doing wrong? Regards, Erich [[alternative HTML version deleted]]