I Have upgraded to the latest version available in the App Store so why am I still getting this message when I try to open up PDFs?
To view the full contents of this document, you need a later version of the PDF viewer. You can upgrade to the latest version of Adobe Reader from www.adobe.com/products/acrobat/readstep2.html For further support, go to www.adobe.com/support/products/acrreader.html
It sounds like you have a special type of form called a "dynamic XFA form".
Currently, Adobe Reader mobile products (Reader for iOS, Android, Windows Phone) do not support dynamic XFA forms that are authored with Adobe LiveCycle Designer.
The message is displayed when a dynamic content is not supported by a PDF viewer. As far as I know, no PDF viewers on iOS support dynamic XFA forms.
Please use the desktop version of Adobe Reader on a Windows or Mac computer to view and fill out XFA forms.
Sorry for the inconvenience.