I am using the DOCX4J library for writing MS Word documents and started receiving this error message.
ERROR org.docx4j.openpackaging.contenttype.ContentTypeManager - No subclass found for /word/media/hdphoto1.wdp; defaulting to binary
Does anyone known what causes it or how to surpress it?
The message means there is no specific Part which represents content of that type, so it is represented using BinaryPart.
The content in question looks like https://en.wikipedia.org/wiki/JPEG_XR
It won't cause any problem opening or working with the docx in docx4j, but adding a new image of this type won't be as convenient as is the case for jpeg, png etc.
Tracking enhancement at https://github.com/plutext/docx4j/issues/560