Cannot use USB port; it is being used by another application.

Cubase
4

Hi Martin and Grim,

First of all thanks for your respons.
very appreciated.

Latest Driver and tools are installed.
( no success )

Next:
1- re-instal Windows 10
2- re-instal Cubase Pro
3- re-instal UR 44 ( included latest drivers )
( no success )

Next:
regedit HKEY_LOCAL_MACHINE - SYSTEM - CurrentControlSet -Services USBSTOR - Value 3-4.
( no success )

Next:
Disable USB Ports from Device Manager
and re-start
( no success )

I’m afraid that the problem must be somewhere
in the software of Cubase pro or in the software of the UR 44
Cause under Cubase SX3 the UR 44 works correctly.
Cubase Pro recoginizes the UR 44.
but still it gives me the message:
Cannot use USB port; it is being used by another application.

Grim: I will read the UR manual again to find a solution for
my problem. :smiley: