Acrobat Reader won't read pdfs: "file path not valid"

Question

I thought that my PlayBook would be the perfect device to read pdfs in the Adobe Reader. The only problem is when I download a pdf from the internet, or copy a pdf from my computer, and click on the file icon from within the Reader, all I get is a cryptic error message that reads "The file path is not valid". No hints at what to do.
At first I thought it was a problem with the file. But every file suffers from the same ill fate. Do you have any suggestions?

Answer 1

Article ID: KB26744
Unable to open any PDF documents on BlackBerry PlayBook
Type: Support Content
Last Modified: 06-17-2011
Product(s) Affected:
    BlackBerry® PlayBook™
Overview
When attempting to open locally saved or attached Adobe® PDF document the following error is returned:
The file path is not valid
Environment
    BlackBerry® PlayBook™ tablet
Cause
The error is returned due to application permissions to of the Adobe® Reader application on the BlackBerry® Playbook™. The 'files' option within Adobe Reader application is set to 'Denied'.
Resolution
Edit the application permissions file access rights for the Adobe Reader application.
1.  On BlackBerry Playbook open Options
2.  Select Security -> Application Permissions
3.  Select Adobe Reader application
4.  Edit file permissions setting to allow the application to access files stored on BlackBerry PlayBook
5.  Save settings by selecting Back button after making changes
rabbitupnorth:
This solution works! Problem solved.