title: Invalid Hyperlink: Malformed URI is embedded as a hyperlink in the document
body: <p>I'm using the OpenXml namespace in my application. I'm using this to read the XML within an Excel file. This works fine with certain excel files but on others I get a run time error saying </p>
  
  <blockquote>
    <p>Invalid Hyperlink: Malformed URI is embedded as a hyperlink in the document.</p>
  </blockquote>
  
  <p>I get the run time on the following line </p>
  
  <pre><code>using (var spreadsheet = 
        DocumentFormat.OpenXml.Packaging.SpreadsheetDocument.Open(filePathCopy, true))
  </code></pre>
  
  <p>I'm not sure why it works for some Excel files and doesn't work on others.</p>