The file name of the PDF File property of the current PDF Pages script line, either has no extension, or has an extension that is not recognizable as an Adobe Acrobat PDF file.
This error often comes from using a Macintosh file directly.
It will not be possible to preview or execute the current script until that error is fixed.
Solution
•Select a PDF File: Automatically opens the PDF selection dialog so that you can select a PDF file to use.
•Delete Script Line: Deletes the current PDF Pages script line.
Topic 182665, last updated on 22-Mar-2021