I'm sure many things are fixed on latest AmiBlitz, there has been bugs even on TED ! Can't latest build compile bb2 anymore? I'm still on 3.8 and it's stable and TED is super fast. I haven't tried any after 3.11, time to test 3.14 ;)
The bb2 files have some sort of hard links that’s why they suggested saving as ab3, which is still supported on 3.8 but is much more portable for newer versions.