I know this is an old problem, but no matter what I do, I just can solve it.
Im on Laptop fujitsu core2dou with win7 64 bit. the audio interface is ZOON H4n.
I tried everything - from trashing databases to reinstall the softs and drivers. I tried it on total other computer (brand new samsung laptop) with i5.
this BUG keep comnig back -
"pro tools hardware is either not installed or used by another program"
I changed the buffer, i changed USB cable, I turned it on and off, changed USB location.
Please help me.