Just know, I installed the LiveCycle ES4 and tried to add the import/export feature on my PDF form. Everything was fine, there wasn't any error message. But when I opened the PDF, it showed me:
"This document enabled extended features in Adobe Reader. The document has been changed since it was created and use of extended features is no longer available. Please contact the author for the original version of this document."
Anyone can help me to figure out this issue?