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#1 Posted : Thursday, April 24, 2008 10:56:52 PM(UTC)
froemmel

Groups: Registered
Posts: 8


Hi,

is there any possibility to stop a scan process?

At the moment I set the cancel property of the the TwainAcquirePageEventArgs to true. But after that I can´t start scanning again?
<code>
      private void acquirePage(object sender, TwainAcquirePageEventArgs e)
        {
            if (stopScan == true)
            {
                e.Cancel = true;
            }
        ......
    }
</code>

How to do this in a correct way?

 

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#2 Posted : Sunday, April 27, 2008 6:41:49 AM(UTC)

Adnan Ismail  
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Can you
tell me what version of LEADTOOLS you are using, and what build number (version info) of LEADTOOLS DLLs you have?

 
#3 Posted : Monday, April 28, 2008 12:05:52 AM(UTC)
froemmel

Groups: Registered
Posts: 8


Hi,

I use LEADTOOLS V15 and Leadtools.Twain.dll Version is: 15.0.1.0.

After I set cancel  to true the scanners stop scanning immediately but when i try to scan again the scanner starts a recalibration and after that I get the followingen error: "DS or DSM reported Error, app shouldn't (no need for your app to report the error)".

When then scanner ends a operation in the correct way ( e.g. no more docuemnts in the feeder or the scan ist finish) I can start another scan-process whiout any problems.

Is there any other way to stop a scan process?




 
#4 Posted : Monday, April 28, 2008 5:52:48 AM(UTC)

Adnan Ismail  
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I added similar code to our C# TwainDemo under this path, but I did not see the problem and I did not get the error you got:
LEADTOOLS 15\Examples\DotNet\CS\TwainDemo

Can you try to modify the demo and see if it works with you? In my test I used a FUJITSU fi-5110C scanner in my test. if you still get the same result, this is probably cause by the Twain driver itself, not by LEADTOOLS.
 
#5 Posted : Monday, April 28, 2008 6:07:10 AM(UTC)
froemmel

Groups: Registered
Posts: 8


Hi,

i changed the example as you suggested, but after canceling the scan process I get the same error. :-(

I use a Plustek PL3000 as scanner. I´ll try a other scanner modell, but first I have to grab one from one of my colleges :-)

I´ll keep you informed.
 
#6 Posted : Monday, May 19, 2008 10:18:39 PM(UTC)
froemmel

Groups: Registered
Posts: 8


Hi, I changed my Scanner model. Now I use a Kokak i1210 Scanner and the cancel-event now works great.
So I will put my Plustek to the black list.

Nice regards from Germany.


 
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