How to fix the error "File is no PDF document"

User question:

> I have some PDF files that show the error "File is no PDF document",

> I can however open them in my Chrome. I have several other files

> that are working in WSW. How can I monitor these problematic PDF

> files in WebSite-Watcher?

This can happen when the web page uses a script to show the PDF files. The PDF files cannot be accessed directly in that case what causes this error message.

What works in most cases is to use the check technology "Chromium / Browser" to monitor these PDF files:

3.	Select the check technology "Chromium/Browser"