I am using the pro version on trial. I am trying to use the function to add attachments, but when I save the file and open in Adobe Reader 9, no attachments. Is it cause its a trail version it does not work?

Ok, I got it to work. When I read your procedure on creating/adding an attachemnt to a PDF, the only thing that I was not doing was "Also note that you cannot add an attachment to a PDF which has been locked or encrypted." When I create a PDF file with your software, it is adding security to the file. I had to select the newly created "secure" file and remove the security via the icon at the top. Once I did that, I was able to add an attachment. I was also able to see the process dialog adding the attachment.

My next question would be, can this security be turned off?

I hate to bother you, but this has now become a challenge.

What file types are allowed to be attached?

I started to add attachments of all types and did not find any issues in doing so, however, can only add one attachment at a time. If I try to add more than one, it does work and the pdf contains only the last successful attachment addition. I can add any type and as many as I want as long as I do it one at a time - it seems.

Even from a brand new file, if I add more than one attachment, it fails to add them.

The security issue from previous post has no baring on this issue.