I mean, remembering that fortran doesnt have exception semantics, what can I do when it invokes a language that does?

I’d suggest to catch all Java exceptions on Java side and pass them back to fortran code via some other means (error code, special result, etc)

Yeah that's what we're doing, so our users should be fine, what I'm really looking for is something that improves dev quality of life. Honestly what I might do update JNA such that unhandled exceptions are logged and a

System.exit()

call is made. Saves a debugging dev from the torrent of unrelated information hes about to get.

Good point. Makes sense