Record ID: SC00050

SCSI Command Fail Error on scanners running VistaScan2.4.3 or earlier under windows 95/98

Symptom:
Error message: "Unknown Error"- "SCSI Command Fail"

Solution:
If you get this Error message when you run a scanner test or any time you access the scanner follow the instructions below: (Solution "A")

1. Cabling Issues:
   
   • Astra Series Scanners: there are four positions that the cable can fit onto the scanner. Try the scanner with the terminator on or off. You can also flip the cable end for end and repeating with or without terminator. Make sure you cycle power to the scanner by unplugging/turning it off and plugging it back in/turn it back on and reboot between trying different cable positions.
   • Vista series and earlier scanners: try the scanner test with or without the terminator. Again, make sure you turn the power to the scanner off and on, then reboot between trying with or without the terminator.
2. Delete and reinstall the drivers.
   
   • Press the "Ctrl", "Alt", and "Delete" keys at the same time, just once. The "Close Program " window will appear. Highlight a program other than "Explorer" and "Systray" (note: some systems do not use "systray") with a single mouse click and hit the "End Task" button. Repeat for all programs except "Explorer" and "Systray".
   • Click on the "Start" button, choose "Programs", and select "Windows Explorer".
   • Using "Windows Explorer", locate and delete the "Vstascan" and/or "Umax" folder from the C: drive.
   • Locate and delete all "Twain.dll" files inside the Windows folder: "Twain.dll", "Twain32.dll", "Twain_32.dll".
   • Locate and delete all "Twain" folders inside the Windows folder: "Twain", "Twain32", "Twain_32".
   • Right click on the "Recycle Bin" and choose "Empty Recycle Bin".
   • Insert UMAX CD-ROM and perform a typical installation.

If you are able to boot your system, access the scanner program and run one scan, then get the "SCSI Command Fail" error when trying to access the scanner a second time, follow the instructions below:(Solution "B")

1. Download the "SCSI Command Fail Patch" (UDSIS.EXE) . If you are unable to download the patch using this link, the file also located in the "Special Downloads" section in the "Downloads" area of ourour web site.
   
2. Place the file on an empty floppy disk.
   
3. Double click on your "My Computer" icon on your desktop. Double click on the "A:" floppy drive and double click on the "UDSIS" file you downloaded.
   
4. Do NOT change the "unzip to" path.
   
5. Reinstall the VistaScan driver:
   
   • Delete the driver using the above instructions (Solution "A" Part 2)
   • Insert your UMAX CD-ROM into the CD ROM drive, and do a custom installation of VistaScan.
     
     1. Double click on the "My Computer" icon and double click on your CD ROM drive.
     2. In the UMAX CD-ROM disk, double click on the "VISTSCAN" folder, double click on the "English" folder and double click on the "Disk1" folder.
     3. Double click on the "Setup.exe" (it should have a floppy disk or computer icon)
     4. Restart your computer after the setup is complete.
6. Shut down your computer and remove the UDS-IS11 SCSI card from your computer.
   
7. Remove the Jumper labeled "J1" and reinsert the UDS-IS11 card into your computer.
   
8. Power the scanner on first and power on the computer when the scanner is ready.
   
9. When Windows prompts you for drivers for the "New Hardware", insert the floppy disk. Change the location that it is looking for the driver to the "A:" drive.
   
10. Once Windows boots, the scanner will work fine.