title: Error in read.table: !header: invalid argument type
body: <p>I am having the strangest of issues. The following code no longer works:</p>
  
  <pre><code>Test&lt;-matrix(rnorm(9),ncol=3)
   colnames(Test)&lt;-c("a","b","c")
   write.table(Test,file="Test.txt")
   d&lt;-read.table("Test.txt",header=T)
  </code></pre>
  
  <p>I get: </p>
  
  <blockquote>
    <p>Error in !header: invalid argument type</p>
  </blockquote>
  
  <p>I tried rebooting R, it didn't help. </p>