title: Error while installing gbm in R on redhat
body: <p>I want to install gbm in R so using the command <code>install.packages("gbm")</code> but getting the error message:</p>
  
  <pre><code>Error : package 'parallel' could not be loaded
  ERROR: lazy loading failed for package ‘gbm’
  </code></pre>
  
  <p>My system is <code>Red Hat Enterprise Linux Workstation release 6.2 (Santiago)</code>. Any solution?</p>
  
  <p><strong>EDIT:</strong></p>
  
  <p>When I try to install "parallel" using <code>install.packages("parallel")</code> I get the following warning:</p>
  
  <pre><code>Warning in install.packages("parallel") :
    argument 'lib' is missing: using '/home/abhay/R/x86_64-unknown-linux-gnu-library/2.10'
  Warning message:
  In getDependencies(pkgs, dependencies, available, lib) :
    package ‘parallel’ is not available
  </code></pre>
  
  <p>What library should I specify?</p>