Editing a GUI form using JPA

[Ricardo Palomares]

Hi all, After a lot of time, I'm trying to come back to Java development. I have an Ant-based Java SE project using Swing and EclipseLink JPA 2.1 originally developed in Java 8 and NetBeans 8.2. I'm now using Java 17 and NetBeans 25 (I have 26 also installed, but I don't think this has to do with 25 vs. 26). On opening a GUI component that invokes an EntityManager I get this error: Other GUI components not involving DB connection (like the main window, with a JFrame and a classic dropdown top menu) can be opened and edited without any problem. The project, however, apparently clean and builds OK. I've replaced the original EclipseLink JPA 2.1 library in the project for the global EclipseLink 2.2.3, but still I keep getting the same error on GUI editing. Any hint about where to start to look? TIA -- Ricardo Palomares (RickieES) https://github.com/RickieES https://sourceforge.net/u/rpalomares/profile http://stackoverflow.com/users/1185157/