The task is to merge PDF x into PDF y, such that PDF y ends up with both its original content and with that of PDF x.
When a co-workder does it with Adobe 8, it works. When I do it in Adobe 9, it doesn't work: in fact, PDF y disappears.
Any one know a potential reason for this?
Adobe what? Adobe is a company.
This is the Adobe Reader forum which cannot merge PDF's so you'll need to let us know what application you are talking about or go back to the forum list and find the correct forum for that application.