[R] R 3.3.0 Crashing: Error in readRDS(nsInfoFilePath) : unknown input format

[Jeff Newmiller]

I don't know why this is happening, but the nsInfo.rds file is part of every installed package (see Section 4.1 of the R Internals documentation) and it sounds like one or more of them are getting corrupted.  This could be because you or your .Rprofile or an .RData file are triggering a bug in one of your packages. 

You might try
* posting the output of the sessionInfo function, 
* looking in your .Rprofile file with a text editor, 
* deleting/renaming any RData files in your working directory,  and perhaps
* clearing/renaming your personal 3.3 package library and re-installing one package at a time to see which one triggers the error. 
-- 
Sent from my phone. Please excuse my brevity.

On May 13, 2016 11:53:05 PM PDT, Amitava Mukherjee <amitmukh2 at gmail.com> wrote:
>Dear All,
>
>Greetings. I hope you will be able to provide kind help with the
>following:
>
>I am facing a strange problem ever since I have started working with R
>3.3.0.
>
>I download and work with it, it was fine. Then when I shut down and
>reopen,
>it is not working properly.
>
>I am getting following message:
>
>Error in readRDS(nsInfoFilePath) : unknown input format
>
>R version 3.3.0 (2016-05-03) -- "Supposedly Educational"
>Copyright (C) 2016 The R Foundation for Statistical Computing
>Platform: x86_64-w64-mingw32/x64 (64-bit)
>
>R is free software and comes with ABSOLUTELY NO WARRANTY.
>You are welcome to redistribute it under certain conditions.
>Type 'license()' or 'licence()' for distribution details.
>
>  Natural language support but running in an English locale
>
>R is a collaborative project with many contributors.
>Type 'contributors()' for more information and
>'citation()' on how to cite R or R packages in publications.
>
>Type 'demo()' for some demos, 'help()' for on-line help, or
>'help.start()' for an HTML browser interface to help.
>Type 'q()' to quit R.
>
>Warning message:
>package "methods" in options("defaultPackages") was not found
>[Previously saved workspace restored]
>
>Error in readRDS(nsInfoFilePath) : unknown input format
>During startup - Warning message:
>package ‘methods’ in options("defaultPackages") was not found
>> ?mean
>Error in readRDS(nsInfoFilePath) : unknown input format
>>
>
>
>I have uninstall it three times and reinstall -- Every time after first
>installation it is working perfectly.
>
>Then when I am closing R window and reopening it, the problem starts.
>
>Kindly suggest what should I do. Looking forward to hear from you,
>
>Best regards,
>Amitava
>
>
>
>
>
>Dr. Amitava Mukherjee, Ph.D.
>Associate Professor,
>Production, Operations and Decision Sciences Area,
>XLRI-Xavier School of Management, India.
>
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>
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