The processor is mainly tested from the command line using the Oracle JDK. I never used it from within Eclipse and I am also not familiar with the whole setup on Eclipse (required plugins, etc).

Given that it works from the command line, but not from within Eclipse I would also assume that there is if not a bug at least an integration issue with JDT. I guess one needs to get the environment up and re-produce the issue as a first step.

I can try to see whether I can at least reproduce the issue, but cannot make a time commitment atm.