Yes, you can use Acrobat 11 to enable XFA forms. In Acrobat 11 the menu item is: File > Save as Other > Reader Extended PDF > Enable More ToolsAlso, you may have heard that Reader 11 is able to save a filled-in form, comment, etc. even though the document is not Reader-enabled. This applies to non-X...

And finally, are you able to do a manual Save As? Is there any chance the path the script is using is incorrect?

Also, is the file on the user's local system or on some sort of network share?

Hmmm...so you're trying this on Reader, correct? As a test, try temporarily disabling protected mode and see if it makes a difference. If it does, you should be able to make it work by making a registry edit. Let me know how it goes.

Yes, you have to create it yourself. The alternative is to use the "app" folder (e.g., execute app.getPath("app", "javascript") in the JavaScript console in Acrobat), in which case the scripts will be available for every user on the machine.

The alternative with Reader is to Reader-enable the document with Acrobat and instruct your users how to attach files as comments, but this doesn't work with dynamic XFA forms, only static.

Font problems are a common cause of this. I'd be interested to hear what you find.

LiveCycle Designer won't help at all with enabling the document to allow file attachments. It used to come with Acrobat Pro, but since ACrobat 11 was released it isn't.LiveCycle Reader Extensions is expensive server-based software that used to add various usage rights to PDFs. It can enable more thi...

Since you don't have access to LiveCycle Reader Extensions to enable documents so that files can be attached in Reader, the script won't work. The best you can do is inform your users how to manually add files as comments.

Are you able to enable the document with LiveCycle Reader Extensions, or do you just have Acrobat Standard?