DynamicPDF Generator for Java has several limitations, as listed here.
Extracting text from a PDF created with character shaping may yield incorrect output.
The HtmlArea does not support Javascript.
HTML Form field elements are not retained as interactive elements, but are flattened when using HtmlArea.
Content such as Flash, Java, and ActiveX coming from the Object tag are ignored in HtmlArea and a rectangle is drawn in place of the Object tag.
The rights-enabled permission of an existing PDF document is not preserved after that document has been merged. The rights-enabled permission acts like a digital signature and any changes to the document will invalidate it. Since the rights-enabled permission is a proprietary feature of Adobe and not part of the PDF specification, Core Suite is unable to revalidate it and add it back to the document.
DynamicPDF core suite does not support decrypting PDF documents that contain custom or unpublished algorithms (40-bit RC4 and 128-bit RC4, 128 -bit AES 256-bit AES are fully supported).