I want to use more than one CyUsbDevices at the same time.
Using Open(0) works fine.
If i try to open the second Device by using the function Open(1), it returns false and the BulkInEndPoint and BulkOutEndPoint is null.
Iam using the Driver Version 3.4.4. With an older Driver it works correctly.
I checked using Open(i) method here and is working perfectly fine. Did you try doing Reset() or Reconnect() methods and then Open() method again. If it still doesn't work, please post your relevant portion of code.