Hi,
I’m testing on Linux, compiled by myself like always.
-b (–background)
Unrecognized option: -b --background
Piotr SQ9FK
Background is only supported if you built wfserver instead of wfview. And not on windows at this time (though not your issue).
Can you make sure you are running wfserver and not wfview with the background flag?
–E
de W6EL