Problem with offset (Glm or glmD) in Design library

Dear List

My question relates to the rms (or Design) package. I have modified
the example from help(Glm) to include an offset argument. It works
with "glm" but "Glm" gives the error

Error in if (!length(fname) || !any(fname == zname)) { : missing
value where TRUE/FALSE needed


# -- begin example library(rms) of<- 100:92

counts<- c(18,17,15,20,10,20,25,13,12) outcome<- gl(3,1,9)
treatment<- gl(3,3) f<- glm(counts ~ outcome + treatment,
family=poisson(),offset=of) f anova(f) summary(f) f<- Glm(counts ~
outcome + treatment, family=poisson(),offset=of) # -- end example

The same error occurs using glmD from the Design package.

I use R version 2.11.1 for Windows and have installed the "rms"
package together with Design and Hmisc.

Is this a bug or am I missing something?

Best regards,

Claus ---------------------------------------- Claus Dethlefsen, MSc,
PhD Biostatistician at Center for Cardiovascular Research Aalborg
Hospital, Aarhus University Hospital, Denmark