Hello, I've discovered a really quick fix if you happen to have MAC hardware at your disposal: If you have a Macintosh handy, and you open the offending file with the Macintosh "Preview" applicatio...you can then "Save as" to make a new copy of the file .pdf. This new file can then be sucessfully opened with Adobe Acrobat Pro (on either Windows or Mac) and the "Invalid Annotation Object" error is now gone. No loss of data and no loss of previous annotations was observed. Good Luck. -Damian
... View more
AdChoices