title: GhostScript **** Warning: considering '0000000000 XXXXX n' as a free entry Error because of CID Font
body: <p>I'm trying to covert PDF to Image using GhostScript9.19.
  But sometimes I can see the warning logs below. (this log is repeating so many times)
  **** Warning: considering '0000000000 XXXXX n' as a free entry</p>
  
  <p>Fortunately, the image is created.
  However, it takes so long time to get the Image when the Error log is shown.
  In normal condition, the converting almost takes 200~400ms.
  But in this case(warning condition), it takes more than 15s.</p>
  
  <p>I found a clue to solve this problem.
  <a href="https://stackoverflow.com/questions/11093051/handling-remapping-missing-problematic-cid-cjk-fonts-in-pdf-with-ghostscript">Handling (remapping) missing/problematic (CID/CJK) fonts in PDF with ghostscript?</a></p>
  
  <p>This problem is cased by CID Font of Chinese, Japanese, and Korean.</p>
  
  <p>Especially, I don't need to Convert Text in PDF files. ( or I can change any font instead of the CID Fonts.)
  I need to convert pictures in PDF files.</p>
  
  <p>So, How can I skip the text in pdf when I converting PDF to Image using GhostScript? Is there options to do this?
  Or I can edit the SourceCode of GhostScript... but I don't know what I need to change..</p>
  
  <p>Please give me some opinion.</p>