title: R within Rstudio cannot find rmarkdown package
body: <p>I am trying to use rmarkdown, within Rstudio (0.98.953) on a PC, for the first time. I have upgraded to the latest versions of R (3.1.1) and R studio. The output from sessionInfo() is provided at the end of this question. </p>
  
  <p>As I understand it rmarkdown should be included within Rstudio. However, when I select to create a markdown document in Rstudio, a dialog box pops up saying additional packages need to be installed. The installation of rmarkdown always then fails, with the following message:</p>
  
  <pre><code>Installing package into '\\cfsk18.campus.gla.ac.uk/SSD_Home_Data_X/jm383x/My        Documents/R/win-library/3.1'
  (as 'lib' is unspecified)
  * installing *source* package 'rmarkdown' ...
  ** R
  ** inst
  ** preparing package for lazy loading
  ** help
  *** installing help indices
  ** building package indices
  ** testing if installed package can be loaded
  *** arch - i386
  Warning in library(pkg_name, lib.loc = lib, character.only = TRUE, logical.return =     TRUE) :
    there is no package called 'rmarkdown'
  Error: loading failed
  Execution halted
  *** arch - x64
  Warning in library(pkg_name, lib.loc = lib, character.only = TRUE, logical.return =     TRUE) :
    there is no package called 'rmarkdown'
  Error: loading failed
  Execution halted
  ERROR: loading failed for 'i386', 'x64'
  * removing '\\cfsk18.campus.gla.ac.uk/SSD_Home_Data_X/jm383x/My Documents/R/win-    library/3.1/rmarkdown'
  Warning messages:
  1: running command '"C:/PROGRA~1/R/R-31~1.1/bin/x64/R" CMD INSTALL -l "\\cfsk18.campus.gla.ac.uk\SSD_Home_Data_X\jm383x\My Documents\R\win-library\3.1"     "C:/PROGRA~1/RStudio/R/packages/rmarkdown_0.2.49_047a80058bb4ef0b142196013d1c4dd8870d4dd9.tar.gz"' had status 1 
  2: In utils::install.packages("C:/Program     Files/RStudio/R/packages/rmarkdown_0.2.49_047a80058bb4ef0b142196013d1c4dd8870d4dd9.tar.gz",      :
    installation of package     'C:/PROGRA~1/RStudio/R/packages/rmarkdown_0.2.49_047a80058bb4ef0b142196013d1c4dd8870d4dd9.tar.gz' had non-zero exit status
  </code></pre>
  
  <p>I assume this is something to do with using a managed desktop in my place of work. However this is not usually a problem as far fewer restrictions are placed on these machines than is usually the case, and all other packages, software etc tend to work. </p>
  
  <p>I have also tried installing rmarkdown directly from github. Again the installer cannot identify the package rmarkdown itself. </p>
  
  <p>What is likely to be the cause of the error?</p>
  
  <h2>SessionInfo output:</h2>
  
  <pre><code>R version 3.1.1 (2014-07-10)
  Platform: x86_64-w64-mingw32/x64 (64-bit)
  
  locale:
  [1] LC_COLLATE=English_United Kingdom.1252  LC_CTYPE=English_United Kingdom.1252        LC_MONETARY=English_United Kingdom.1252
  [4] LC_NUMERIC=C                            LC_TIME=English_United Kingdom.1252    
  
  attached base packages:
  [1] stats     graphics  grDevices utils     datasets  methods   base     
  
  loaded via a namespace (and not attached):
  [1] tools_3.1.1
  </code></pre>
  
  <h2>Attempt to install directly from github repo:</h2>
  
  <pre><code>devtools::install_github("rstudio/rmarkdown")
  Installing github repo rmarkdown/master from rstudio
  Downloading master.zip from https://github.com/rstudio/rmarkdown/archive/master.zip
  Installing package from C:\Users\jm383x\AppData\Local\Temp\RtmpINmLRv/master.zip
  Installing rmarkdown
  Installing dependencies for rmarkdown:
  httpuv
  Installing package into ‘\\cfsk18.campus.gla.ac.uk/SSD_Home_Data_X/jm383x/My     Documents/R/win-library/3.1’
  (as ‘lib’ is unspecified)
  trying URL 'http://cran.rstudio.com/bin/windows/contrib/3.1/httpuv_1.3.0.zip'
  Content type 'application/zip' length 857357 bytes (837 Kb)
  opened URL
  downloaded 837 Kb
  
  package ‘httpuv’ successfully unpacked and MD5 sums checked
  
  The downloaded binary packages are in
      C:\Users\jm383x\AppData\Local\Temp\RtmpINmLRv\downloaded_packages
  "C:/PROGRA~1/R/R-31~1.1/bin/x64/R" --vanilla CMD INSTALL  \
    "C:\Users\jm383x\AppData\Local\Temp\RtmpINmLRv\devtoolscec10833677\rmarkdown-master"       \
    --library="\\cfsk18.campus.gla.ac.uk/SSD_Home_Data_X/jm383x/My Documents/R/win-   library/3.1" --install-tests 
  
  * installing *source* package 'rmarkdown' ...
  ** R
  ** inst
  ** tests
  ** preparing package for lazy loading
  ** help
  *** installing help indices
  ** building package indices
  ** testing if installed package can be loaded
  *** arch - i386
      Warning in library(pkg_name, lib.loc = lib, character.only = TRUE, logical.return =     TRUE) :
        there is no package called 'rmarkdown'
      Error: loading failed
      Execution halted
      *** arch - x64
       Warning in library(pkg_name, lib.loc = lib, character.only = TRUE, logical.return = TRUE) :
    there is no package called 'rmarkdown'
      Error: loading failed
      Execution halted
      ERROR: loading failed for 'i386', 'x64'
  * removing '\\cfsk18.campus.gla.ac.uk/SSD_Home_Data_X/jm383x/My Documents/R/win-      library/3.1/rmarkdown'
  </code></pre>