Hi,

This happens in 2.8 and 2.9.  I am posting this here because I am not sure 
if one should use bug.report for reporting bugs in unreleased versions.

I was trying to run the example from the help page of plot.rpart.  I got

> library(rpart)
> fit <- rpart(Price ~ Mileage + Type + Country, cu.summary)
> plot(fit, compress=TRUE)
Error in get(getOption("device")) : invalid first argument

This also produces a blank graphics window.  When I run the plot command 
again everything seems to work fine, so the error only occurs when the 
graphics window is not open.

I use Windows XP SP2.  I just compiled the newest RC of 2.8 (R version 
2.8.0 RC (2008-10-14 r46714)).  I ran "make fullcheck" on it and 
everything checked out fine.

The same thing happens in 2.9 but it worked fine in 2.7.2.

Andy


__________________________________
Andy Jaworski
518-1-01
Process Laboratory
3M Corporate Research Laboratory
-----
E-mail: apjaworski@mmm.com
Tel:  (651) 733-6092
Fax:  (651) 736-3122
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