Acrobat Reader unable to open older files

[DeborahB832]

What do I need to do to open older files that Reader is unable to open?

I am using the current version of the software.

I get this error:

What has caused this to happen?  Did it happen as the result of a Reader software upgrade?

[Bernd Alheit]

Can you share one of this files?

[DeborahB832]

There is no way to attach a file.  Please advise.

[Bernd Alheit]

You can attach the file to your first posting.

https://community.adobe.com/t5/using-the-community/community-how-to-guide-tips-amp-best-practices/td... 

[DeborahB832]

I am unable to upload my examples.

I get the following error messages when I try to Post.

"The attachment's testamentary trusts.pdf content type (application/pdf) does not match its file extension and has been removed."

One example was 2 files created 20 minutes apart....1 file opens, the other doesn't.

[Bernd Alheit]

You can share the file on documentcloud.adobe.com

[DeborahB832]

I uploaded the files as suggested.

When I try to create a Share link to the documents I get an error message saying "This file can't be sent for viewing".

[Bernd Alheit]

Looks like that it is not a PDF file or it is empty.

[Bernd Alheit]

What can you see when you open the file in Notepad?

[DeborahB832]

It looks like it is empty.

The file size indicates that there should be contents in the file.

[Bernd Alheit]

A empty file is not a PDF file.

[Ariane5FB0]

hello! my school computer is a lenvo and i need help taking off the child protection service! *TW: THIS WILL NOT BE PERMINATE* Im on my winter break rn and i dont have any other computer so i want to watch shows, JUST TO BE CLEAR, i have asked my teachers if this would be ok and they said as long as nothing innapropriate is on your history; so if anyone could help out that would be greatly appreciated!

     Thank you!~

[Test Screen Name]

Ariane, sorry, you have posted in a forum dedicated only to the Acrobat Reader product, which has no child protection features. I think you need to find help elsewhere.

[JR Boulay]

"There is no way to attach a file. Please advise."

==> https://helpx.adobe.com/acrobat/using/sharing-pdfs.html

[Bernd Alheit]

How does you use this when the file can't be open?

[JR Boulay]

"How does you use this when the file can't be open?"

==> https://documentcloud.adobe.com/link/home/