title: `Error in file(con, "r") : cannot open the connection` from running BRugsFit()
body: <p>I have a error about <code>Error in file(con, "r") : cannot open the connection</code> from running BRugsFit(). I assume all the input arguments are fine, and the calling code is </p>
  
  <pre><code>&gt; output = BRugsFit("model.txt", data, inits, numChains = 2, seed=6, parametersToSave,nBurnin = 100,nIter = 1000, nThin = 5, coda = T,digits = 5)
  
  ****
  * BlackBox
  * string too long
  - HostFiles.Init  (pc=00003FB1, fp=BFFDE550)
  - HostFiles.$$  (pc=0000000A, fp=BFFDE560)
  ****
  Error in file(con, "r") : cannot open the connection
  In addition: Warning message:
  In file(con, "r") :
    cannot open file '/tmp/RtmpU7v9PZ/buffer.txt': No such file or directory
  </code></pre>
  
  <p>So I wonder what might be the reason of the error, and how to solve it? Thank you so much!</p>