title: Errors while using readr, write_csv
body: <p>Firstly,</p>
  
  <p>I'm unable to use write_csv() function. I get the below error</p>
  
  <blockquote>
    <p>Error in function_list[k] : could not find function
    "write_csv"</p>
  </blockquote>
  
  <p>I've readr pacakge installed which gives the following warning:</p>
  
  <blockquote>
    <p>Error in get(Info[i, 1], envir = env) :    cannot open file
    'C:/Users/kishore/Documents/R/win-library/3.3/rlang/R/rlang.rdb': No
    such file or directory In addition: Warning message: package ‘readr’
    was built under R version 3.3.3  Error: package or namespace load
    failed for ‘readr’</p>
  </blockquote>
  
  <p>Second,</p>
  
  <p>when I'm trying to read a .csv or excel file I get the below error</p>
  
  <pre><code>c &lt;- read_excel("C:/Users/kishore/Desktop/c.xlsx")
  </code></pre>
  
  <blockquote>
    <p>Error in get(Info[i, 1], envir = env) :    cannot open file
    'C:/Users/kishore/Documents/R/win-library/3.3/rlang/R/rlang.rdb': No
    such file or directory</p>
  </blockquote>
  
  <pre><code>View(c)
  </code></pre>
  
  <blockquote>
    <p>Error in View : object 'c' not found</p>
  </blockquote>
  
  <p>I'm not sure what is the issue please advise</p>