[Rd] Formal methods are not loaded from NAMESPACE in reloadedworkspace image

[Pfaff, Bernhard Dr.]

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" 
>*****************************************************************
>Confidentiality Note: The information contained in this 
>mess...{{dropped}}
>
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