Follow this article: https://support.ptc.com/appserver/cs/view/solution.jsp?n=CS40919&art_lang=en
step 5
5. To generate the thumbnails using server side thumbnail generation
The pdf has converted successfully, the loaderoptions.txt config file is also created with my script, but the thumbnails create failed.
I use latest Windchill version 11 M020, anyone can help me?