title: Excel vba workbooks.open event giving a runtime error 1004 - The Disk Is Full
body: <p>I'm getting a 1004 disk is full error when I try and open a file using:</p>
  
  <pre><code>Workbooks.Open Filename:=inputfolder &amp; "\" &amp; inputfile, ReadOnly:=True
  </code></pre>
  
  <p>I have also tried this with the filepath and name hard-coded, with the same result. Does anyone have any ideas as to the cause?</p>