Sorry but few Pdf in not anke to open please help me

Hi there 

Hope you are doing well, and thanks for reaching out.

As described, it's an issue with a few PDFs. What happens when you try to open these PDF files? Do you get any error message? If yes, please share a screenshot for better understanding.

Also, try opening the same file in Acrobat Reader (a free application) on the desktop and see if it opens there.

Let us know how it goes.

~Amal