Are you using Apple Mail to read email on your iPad?
Would you please take a look at the "Open from Mail" section in the following FAQ document to see if it helps?
Please let us know if you use some other email app on your iPad or have additional questions.
This is very embarassing, I found the file at the bottom of all the rec'd and sent emails and opened it with no problem. I think my problem before was an older version of Adobe??? Sorry for the bother!! D
Sent from my iPad
No problem. I am glad to hear that you figured it out!
Please bear in mind...For a single-page PDF document, Apple Mail often embeds a preview image (instead of showing the attachment icon) in an email body. In that case, you need to press & hold over the preview image to display the popover to use the iOS "Open in" feature.