Error 2019 is displayed when Windows fails to detect the scanner driver on your machine. To solve this problem, please reinstall it properly, making sure you download the latest version:
- Unplug the USB cable from the scanner
- Close Readiris
- Uninstall the "IRIScan Executive 4 driver" or "IRIScan Express 4 driver" and the Buton Manager via the control panel.
- Install the new driver and install the ButtonManager again:
- Connect the USB cable
- Start scanning
If the problem has not been resolved, open the Windows Start menu ► Settings ► System ► Power and Sleep ► Additional power settings on the right ► Change scheduling settings ► Change advanced power settings ► USB settings ► Set to Disabled.
It is also worth testing by changing the usb cable. The IRIScan Express/Executive 4 uses a standard micro usb cable.