Post Scan Event is called twice

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Post Scan Event is called twice

Post by vanilla Y » Mon Oct 19, 2009 12:37 PM

Hi,

After I scan a document, it goes twice to the Post Scan event.
First time is good, but then immediately it enters another time to this event.
What can be the reason?

I'm registered only once to the event:

VSTwainDocument.PostScan += new AxVSTWAINLib._IVintaSoftTwainEvents_PostScanEventHandler(VSTwainDocument_PostScan);

Thanks ahead,
Vanilla

Re: Post Scan Event is called twice

Post by Alex » Mon Oct 19, 2009 01:58 PM

Hello Vanilla,

What scanner do you have? I think you have duplex scanner with enabled duplex. PostScan event occurs for each side of the scanned page.

Best regards, Alexander

Re: Post Scan Event is called twice

Post by vanilla Y » Tue Oct 20, 2009 06:18 AM

Hi Alex,

My scanner doesn't have duplex option. :(

In my code, I do the following check:

if (m_bIsDuplex)
{
if (VSTwainDocument.Duplex != 0)
VSTwainDocument.DuplexEnabled = 1; //scan the doc from both sides
}
else VSTwainDocument.DuplexEnabled = 0; //in my case, goes to this line
VSTwainDocument.Acquire();

Should I do another thing to disable the duplex option?

Thanks,
Vanilla

Re: Post Scan Event is called twice

Post by Alex » Wed Oct 21, 2009 05:11 AM

Hello Vanilla,

Please send the following information to support@vintasoft.com:
1. What scanner do you use?
2. Log-file generated by VintaSoftTwain.NET Library

Here are steps which you should do to generate a log-file of scanner's work:
1. Set the IsLoggingEnabled property to True before the StartDevice method.
2. Set the path to log-file with the LogFilePath property if path "c:\vstwain.log" is not accessible by your application.
3. Run your application.
4. Send us a log-file and detailed description of the problem.

Best regards, Alexander

Re: Post Scan Event is called twice

Post by vanilla Y » Wed Oct 28, 2009 07:43 AM

Hi Alex,

As you said, I added the following:
VSTwainDocument.IsLoggingEnabled = 1;
VSTwainDocument.StartDevice();
VSTwainDocument.LogFilePath = "c:\vstwain.log";

I scanned a document and this is what I've got in c:\vstwain.log:

9:35:36.750 StopDevice

9:35:36.750 OWM: 92933250 129 0 101367484 0

9:35:36.750 OWM2

9:35:36.750 OWM8

9:35:36.750 OWM: 92933250 131 0 101367524 0

9:35:36.750 OWM2

9:35:36.765 OWM8

9:35:36.765 OWM: 92933250 1 0 101367464 0

9:35:36.765 OWM2

9:35:36.765 OWM8

9:35:36.765 OWM: 92933250 5 0 0 0

9:35:36.765 OWM2

9:35:36.765 OWM8

9:35:36.765 OWM: 92933250 3 0 0 0

9:35:36.765 OWM2

9:35:36.765 OWM8

9:35:36.765 ODSM1

9:35:36.765 ODSM2

9:35:36.765 C:\WINDOWS\TWAIN_32.DLL

9:35:36.765 ODSM2-1

9:35:36.765 ODSM20

9:35:36.984 StartDevice - 50047 92933250 20319114

--------- log till here

I'm using Epson perfection 1660.

Do you have a clue?

Thanks a lot!!!
Vanilla

Re: Post Scan Event is called twice

Post by Alex » Wed Oct 28, 2009 02:29 PM

Hello Vanilla,

Information you provided is not full. Please send full log-file to support@vintasoft.com.

Best regards, Alexander

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