Most likely the scanner has dirt on the glass that is over the imaging array or the glass may be scrached. If the glass is scratch, the imaging CCD array need to be replaced. If you do not scan the rear of your documents, you can swap the upper with the lower in the case that one is scratched.
The imaging array are the green long bars, one at the bottom of the paper path halfway inside the scanner and the other is above it. Look closely for a small spot of black toner or dirt stuck
on the glass. Take a soft cloth, wet it with water or alcohol if needed and clean the glass.
Pass you finger over the glass, try to feel if all of the toner or rubber residue has been removed.
You might try looking at the specific area were your documents image is getting the line. It will
help you pinpoint where you should clean. CAREFULL not to push on the glass as this
might break it. Hope this helps.
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I am not familiar with the scanning software that you are using. But I am sure there must be a button after the scan completes that says save. Above save it should show the destination of where it is saving like My Pictures or my Documents for example. If it does have have a line like C: My Documents above the save button then to the right of that line you will see a small black triangle click on that and the line will drop down and you can select another destination to save your document.
I hope this helps you out if it does please click on Yes that I did try and help you. Thank you.
Try scanning a bigger document. Use a blank page big as the scan capacity and scan the blank page.
If for example you are using an a3 scanner, scan a blank A3 page.
When scanning blank page set resolution to an high value, so that you does not lose pixels.
Check scan result, and explore the whole document using zoom to see if the line is still present on the test scan of the blank page.
If there is still the line, then it is either a scanner dirty, probably inside glass, or a dafective sensor on CCD sensor array.
If there is no line, then the problem is usually depending on the software.
In that case uninstall the software and install it again.
If that is not enough to fix the problem, try uninstalling software, doing a system restore to a date before the problem started , and then installing software again.
If the line is horizontal , that is usually a loss of power on the high voltage to lamp. Try reinstalling software first, if that does not fix the problem , and line is horizontal, then it is fault mentioned above. Horizontal lines at the end of a document may also be caused by faulty scanner control board, or scanner going out of memory.
Go to Kodak's website and download the scan verification tool (the SVT), and see what it tells you. I use the 2500D with an Adaptec 2940 SCSI controller, and a 50-50 pin SCSI Cable. I use the twain driver from Kodak's website and paperport 9 software. This combination seems to work.
The Kodak 3500 scanner series is probably the best scanner ever made, but NO, it doesn't read anything! Think of it as a digital camera. It only takes pictures. All OCR, ICR, BAR Code, etc. has to be read by software. Your software looks at the images and pull any info that it has been designed to detect off of that image. Some older scanners had built in bar code and patch code reading, but more and more, the software now does it, usually in conjunction with a Kofax card in the PC.
I have had the same problem. That error represent a document still in the scan path. You will probably find there is no paper in the scanner. I tried this and it works every time. On the top of the scanner there is an access door. You will find this just above the discharge rollers. Open that door and either blow air in the compartment or blow hard using your mouth to clear dust. Close the door. That should resolve the problem. It is my guess that dust collects on sensors and the scanner is tricked into thinking there is paper in the path.