I can't understand why this JAXB IllegalAnnotationException is thrown

Question

This is my XML file:

Answer 1

I once received this message after thinking that putting @XmlTransient on a field I didn't need to serialize, in a class that was annotated with @XmlAccessorType(XmlAccessType.NONE).

In that case, removing XmlTransient resolved the issue. I am not a JAXB expert, but I suspect that because AccessType.NONE indicates that no auto-serialization should be done (i.e. fields must be specifically annotated to serialize them) that makes XmlTransient illegal since its sole purpose is to exclude a field from auto-serialization.