Skip to main content

Cannot locate SCSI device Error 20391 when loading a Canon DR-3080CII in VRS 4.5 on Windows 7 64-bit


QAID # 15912 Published

Question / Problem:

When attempting to scan with VRS and a Canon DR-3080CII scanner on a Windows 7 64-bit system, the following error occurs when using the Kofax Component Installer:

error 20391 cannot locate SCSI device.

After installing the 64-bit ISIS driver, it takes up to 5 minutes to load the scan source.

Answer / Solution:

The Canon driver that is installed with the Kofax VRS 4.5 Component Installer for the Canon DR-3080CII is a 32-bit driver that is not compatible with the 64-bit OS. In addition, the Canon 64-bit ISIS driver causes slow scanning behavior in ISIS-based applications.

It is recommended to create a compatible scan source using the 64-bit TWAIN driver:

  1. Install the Canon DRIT driver installation, which loads both TWAIN and ISIS drivers.
  2. Open the Kofax Scanner Configurator and un-check the selection box for VRS Certified scanners.
  3. Locate the Canon "Canon DR-3080CII TWAIN" option in the scanners list, and configure the scan sources based on the TWAIN scanner driver.

The Canon DR-3080CII is no longer considered a certified scan source in Kofax VRS 5.1.1 and higher


Applies to:

Product Version
VRS 4.5

Keywords: Windows seven 64-bit, Windows seven 64 bit