Suddenly my Canoscan300f decided to stop working - doesn't come on at all. Get an error message saying - Twain error and it might not be connected correctly to computer. We have checked that and can find no problem there. Also we have uninstalled and reinstalled the software as well as physically disconnecting and reconnecting the unit. No luck there at all. Any suggestions? Thanks. Carol P.

connect to your network server

The TWAIN device is the scanner itself. The program seems to be saying it can't see the scanner.

Is this scanner new to your computer?
Have you installed the driver for it?
Which program is giving you the error message?

Reinstall the Twain Drivers and check.

WHAT DID THE ERROR MESSAGE SAY
CHECK DEVICE MANAGER AND SEE IF ANY OF YOUR DRIVERS HAVE ? OR !

If connected via USB, unplug cable and insert into another available port and error message should disappear.

Hi toolpusher

Try going to CanoScan Toolbox > Settings and reset the 'defaults' button at bottom... this will restore factory settings and hopefully fix your problem... The other error message you can expect to get is "unable to scan - insufficent memory, check your **** space' (or something similar)... same fix works for both! ...Have had both messages on mine, sounds like a semi-regular conflict on some sort, but seems to be easily fixed. Good luck :-)

What is your operating system?

If XP, check your device manager to see if the scanner is being recognized by XP.

What is your scanning software?
Try to use another scan program ( a free demo version should work fine.)

Are you using TWAIN or an ISIS driver? If it is a TWAIN driver, then any Photo editing program should be able to connect ( usuallly!?).

Hello,

The Twain error message sounds like a Windows error... I wonder if the software you are trying to use is for Windows, and not MAC.

Chester

Hello,

 

I have seen your message stating that "Initialization failed - Unable to acquire TWAIN-compliant device" error is received when trying to connect USB-Parallel type to your Laptop.

 

Well,  Printer  Panasonic UF4100, recommends to use only " Printer/Scanner Interface as Bi-directional Parallel (IEEE1284) " means you need to use Parallel cable to connect Printer to the Computer/Notebook.  You may receive some communication error messages if you are using a  "PORT REPLICATOR CABLE"( USB TO PARALLEL connector).  The error message that you have received is related to the communication error. Futher, if you use same USB- Parallel cable for long time the Printer Hardware functionality might go bad, since Printer memory gets confused and will not read or detect the Cable , since it is not a cable to use  mentioned by Panasonic Manufacturer.

 

Let me tell you, general functionality of Printer like Printing would work even if you use USB-Parallel cable. But it is not a case with Scanner and Fax functionality.

 

Hence, I recommend you to use only Parallel cable to connect your Printer to the Laptops.

 

I hope that this will resolve the issue for you.

 

You can email me at [email protected] if you need further assistance.

 

Bye.

When I had the cable that came with the printer connected to the scanner, and the cable that came with the scanner connected to the printer, the scanner didn't work.

Changing the cables changed everything.