Thanks for your response @alban …yeah i don’t want it  
I deleted all of cuda stuff
but i don’t know where i am wrong that still it gives me this error
in one line i see this code:
parser.add_argument("–device_id", type=int, default=0)
that i think it uses cuda as default …
do u have any idea what value i set for default that it uses cpu
i used -1 but it gives me error that it can not be negative