The call to ProRWTS init function happens after ProDOS is overwritten by the copy of ROM to LC RAM.
ProRWTS needs to call a ProDOS function to determine the current prefix, which fails if LC RAM was written first.
The fix is to call init before making the ROM to LC RAM copy.
The call to ProRWTS init function happens after ProDOS is overwritten by the copy of ROM to LC RAM. ProRWTS needs to call a ProDOS function to determine the current prefix, which fails if LC RAM was written first. The fix is to call init before making the ROM to LC RAM copy.