-What version of the driver and which OS are you using?
-Which EP do you get the failure on? Could you elaborate on what failure you're facing?
thank your for your reply.
The problems appear with Windows 7, and mybe also with Windows 10, my colleague wasn't sure about that.
The driver Version is 18.104.22.168 (as shown in in inf files)
I'm not sure with which endpoint it happens, because we use Control Transfers to start the bulk Transfers.
It might be an EP0 Control Transfer or a EP8 Bulk IN Transfer.
Unfortunately I haven't got more infirmation on this since my first post.