opening a pdf files gives me an error

[Ben Barraza]

this is the error that shows

what can be done?
( i can open it with foxit)

[radzmar]

The message means that Acroabt Reader found some issues in the PDF structure of the currently displayed page. Reader can handle some minor issues to make the PDF still viewable on screen. But in case that message appears, it really means, the PDF is damaged in some way. 

[Zee02]

It shows that your PDF files is damaged and needs to be fixed, you can use a PDF repair tool to fix this issue.