 the following:</p>
<ul>
          
<li>Empty or wrong baseDir setting.</li>
          
<li>Spelling errors in the file name (including using the wrong case).</li>
          
<li>Security Problems (i.e. image was not delivered because FOP is not allowed to read the file).
This is especially a problem if the external file is retrieved over HTTP.
Possible issues include security settings on the server, server configuration, and missing cookies or other authorization information.
Any easy way to check this is 