Dear Uwe and David,
 
Thank you, deleting the .RData file did the trick.  It's fantastic that you are so readily willing to help.
 
Paul

________________________________

From: Uwe Ligges [mailto:ligges@statistik.tu-dortmund.de]
Sent: Sat 4/11/2009 3:27 PM
To: Prew, Paul
Cc: r-help@r-project.org
Subject: Re: [R] Fatal Error (was Error in saveLog(currentLogFileName)





Prew, Paul wrote:
> Hello,  I hope someone can advise me on how to get R running on my Windows PC again.  I uninstalled R2.8.1, and also the previous version 2.8 that were on my hard drive.  I reinstalled 2.8.1, but when I started the program, the message below came up, and R shut down.
> 
> "Fatal error:  unable to restore saved data in .Rdata"
> 
> I uninstalled and reinstalled 2.8.1, but same results.  Then I uninstalled 2.8.1 and downloaded the 2.9 beta version.  Still the same fatal error message.
> 
> Any advice on how I can rectify whatever I did to wreck R?


Probably your .Rdata file contains some objects that cannot be restored
in the newer version of R. Perhaps some S4 object that is no longer valid?
You could try to load the workspace with your old version of R again. Or
better, if you do not need the wrokspace, just delete the .Rdata file in
your working directory.

Best,
Uwe Ligges

> thanks,
> Paul
> 
> 
>
> ________________________________
>
> From: David Winsemius [mailto:dwinsemius@comcast.net]
> Sent: Thu 4/9/2009 2:40 PM
> To: Prew, Paul
> Cc: r-help@r-project.org
> Subject: Re: [R] Error in saveLog(currentLogFileName
>
>
>
>
> On Apr 9, 2009, at 2:17 PM, Prew, Paul wrote:
>
>> David,  thank you for your helpful reply.
>>
>> a) The sessionInfo goof is actually kind of enlightening.  I'm
>> assuming that the purpose of adding the "()" symbols is to tell R
>> that sessionInfo is a function to be invoked, and leaving "()"
>> empty  says to use default arguments?
>
> Yes. Exactly.
>
>>
>> b)  In the R GUI, I end my session by using the menu File > Exit.  A
>> dialog appears, asking, "Save workspace image?", and I choose Yes.
>>
>> In fact, I just did it and got a message, never seen this one before
>>
>> "Console not found.  Error in structure(.External"dotTclObjv:,objv, 
>> PACKAGE - "tcltk"), class = "tclObj"):[tcl]invalid command name ".
>> 6.1".
>
> I am not an expert in the Windows GUI, but as a former user of it, I
> would wonder if my installation of tcltk had gotten corrupted and
> would try to reinstall. Caveat: That advice could be worth what you
> paid for it.
>
>> Closed that message, another similar message was behind it, but now
>> the command name was "17.1"
>>
>> c) yes, agreed --- John Fox has been helpful to me a couple of
>> times.  I like the R Commander (it automatically adds those pesky
>> details like () that elude me), but I can't go the CRAN to get
>> packages from it, so I end up back at the GUI to install a package. 
>> John has told me that moving back and forth between the GUI and
>> Commander is not how Commander was intended to be used.  Perhaps
>> this practice has led to some of the present confusions.
>>
>> Let's say I save a script or history or similar file that I would
>> like to recall at a later time,
>> If I save the file using RCommander, should I only open the file
>> using R Commander?  Ditto for R GUI?  Regardless of which platform
>> I'm saving the files with, they seem to have some of the same
>> extensions, ".R", ".r", ".Rdata", etc.
>
> I doubt that would be necessary, assuming the scripts do not have
> function calls that depend on R Commander being around. Files with .r
> extensions are just text files by another name.
>
> I could not find a saveLog function with R-search restricted to
> functions but did find it as an argument to RCmdr. IIRC, RCmdr uses
> Tck/Tl extensively.
>
> --
> David
>
>>
>> Thanks,
>> Paul
>>
>> Paul Prew  |  Statistician
>> 651-795-5942   |   fax 651-204-7504
>> Ecolab Research Center  | Mail Stop ESC-F4412-A
>> 655 Lone Oak Drive  |  Eagan, MN 55121-1560
>>
>> -----Original Message-----
>> From: David Winsemius [mailto:dwinsemius@comcast.net]
>> Sent: Thursday, April 09, 2009 12:17 PM
>> To: Prew, Paul
>> Cc: r-help@r-project.org
>> Subject: Re: [R] Error in saveLog(currentLogFileName
>>
>> This is just two suggestions and a guess.
>>
>> a) When you desire the information from sessionInfo ,you need to
>> type :
>> sessionInfo()   # not sessionInfo
>>
>> ... results come from function calls and all you got was the
>> sessionInfo code produced by the implicit print function to which you
>> gave the argument sessionInfo.
>>
>> b) Tell us exactly the methods you used to save "my script", "my
>> workspace", "etc"?
>>
>> c) As a guess, you had the Zelig package loaded under R-Commander
>> yesterday but not today. The right person to ask this question of
>> might be one of those package maintainers. (John Fox is very good
>> about supporting R-Commander.)
>>
>>
>>
>
> David Winsemius, MD
> Heritage Laboratories
> West Hartford, CT
>
>
>
>
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