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2013-07-25T17:37:50.957
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Thanks for updating your question with some example code. I cannot completely replicate your circumstances because I presently don't have immediate access to Amazon EC2, and I don't know the specific type of instance you are using. But here a couple of suggestions for de-bugging your issue, which I have a hunch is being caused by a missing package. 1. Try to install the offending packages via your R script At the very beginning of your R script, before you try to load any packages, insert the following: <pre><code>install.packages(c("XLConnect", "rJava")) </code></pre> If your instance includes a specified CRAN mirror (essentially, the online repository where R will first look to download the package source code from), this should install the packages in the same repo where your other packages are kept on your server. Then, either <code>library</code> or <code>require</code> should load your packages. (sidenote: <code>rJava</code> is actually a dependency of <code>XLConnect</code>, so it will automatically load anyway if you only specify <code>library(XLConnect)</code>) 2. If the above does not work, try installing the packages via the command line This is essentially what @Ben was suggesting with his comment. Alternatively, see perhaps <a href="https://askubuntu.com/questions/160499/how-can-i-install-rjags-on-ubuntu-ami-on-ec2">this link</a>, which deals with a similar problem with a different package. If you can, in terminal on the server, I would try entering the following three commands: <pre><code>sudo add-apt-repository ppa:marutter/rrutter sudo apt-get update sudo apt-get install r-cran-XLConnect </code></pre> In my experience this has been a good go-to repo when I can't seem to find a package I need to install. But you may or may not have permission to install packages on your server instance.
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