To free up device or resource that is busy

Hi,

Are there any commands to free up the usb of the usrp from linux?

I’m working on receiving and transmitting signals between 2 usrps but i
realised that, once i start the receiver, even though i exited from the
program in the terminal and reopen the same file, i will get the error
message:

usrp_open_interface:usb_claim_interface: failed interface 2
could not claim interface 2: Device or resource busy

Any help is appreciated! Thanks!Regards,Joreen