WG: Formal methods are not loaded from NAMESPACE inreloadedworkspace image

Dear R-Devel subscriber,

as a follow up to my yesterday's email: I tested an analogous example
with the S4-package "flexclust" by executing the following code:

library(flexclust)
example(cclust)
cl

After saving the work space and starting a new R process with the
restored work space, the same behaviour (i.e., the methods pertinent to
"flexclust" are not used, even after executing  library(flexclust)).
Yesterday, I executed the code below on a Linux platform with R 2.4.0
and it showed the same behaviour as R 2.5.0dev on Windows. As it seems
right now, the behaviour is platform independent and not peculiar to R
2.5.0dev.

Any pointers and help for solving this problem is much appreciated.

Best,
Bernhard   

Dear R-Devel subscriber,

I was hinted to the following problem with package 'urca':

If one starts R and executes for instance:

library(urca)
example(ur.df)

## output as expected, but omitted here

class(lc.df)

[1] "ur.df"
attr(,"package")
[1] "urca"

class(summary(lc.df))

[1] "sumurca"
attr(,"package")
[1] "urca"

everything works fine. Now, save the workspace image and quit R. After
starting R again with the previously restored workspace image one has:

ls()

[1] "lc.df"   "Raotbl3"

class(lc.df)

[1] "ur.df"
attr(,"package")
[1] "urca"

lc.df
## now the 'show'-method for objects of class 'ur.df' is not utilised,
rather the generic 
## displaying all slots

library(urca)
lc.df

## still the same as compared to the above output.
## similarily

class(summary(lc.df))

[1] "table"


In the NAMESPACE file export directives for methods and classes are
included as:

## Classes       
exportClasses("urca", "ca.jo", "cajo.test", "ur.kpss", "ca.po",
"ur.ers", "ur.pp", "ur.sp", "ur.df", "ur.za", "sumurca")
## Methods
exportMethods("show", "plot", "summary")

Any help or pointers for solving this problem is much appreciated.

Best,
Bernhard

sessionInfo()

R version 2.5.0 Under development (unstable) (2006-10-10 r39600) 
i386-pc-mingw32 

locale:
LC_COLLATE=German_Germany.1252;LC_CTYPE=German_Germany.1252;LC_
MONETARY=
German_Germany.1252;LC_NUMERIC=C;LC_TIME=German_Germany.1252

attached base packages:
[1] "methods"   "stats"     "graphics"  "grDevices" 

"datasets"  "utils"

[7] "base"     

other attached packages:
   urca fortunes 
"1.0-0"  "1.3-2" 
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