Is "my document" a local or online doc? What is the full and exact message you are getting?
[topic moved to Reader/Acrobat DC for Mobile forum]
Do you see the following message when you open the PDF document in Acrobat Reader for iOS?
If so, you have a special type of form called a "dynamic XFA form".
Currently, Acrobat Reader mobile products (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.