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Date Posted: 20:21:15 03/20/00 Mon
Author: Michel
Subject: Re: Demo app reboots computer
In reply to: John Makar 's message, "Demo app reboots computer" on 13:37:04 03/20/00 Mon

Hi John,

Some scanner problems are hard to troubleshoot. I think your scanner does not support hiding the user interface. This is not a mandatory feature in a twain driver.

Are you successfull scanning when ShowUI := True?

Another thing to be careful with when testing scanning, is not to run the compiled program from the IDE. This may cause the program and IDE to freeze, as TWAIN's message loop seems to interfere with the debugger.

Best regards,


> I compiled your demo app under Delphi 4 pro.
> Problem under
> procedure TMainForm.ScanMenuClick(Sender: TObject);
> After I uncomment these lines and recompile,
> FScanner.ShowUI := False;
> FScanner.RequestedXDpi := 200;
> FScanner.RequestedYDpi := 200;
> FScanner.RequestedImageFormat := ifColor16;
> The scanner ( a mustek 1200 III EP ) starts a scan
> then causes a lockup with the blue screen that I can't
> get out of without pressing the reset button.
> Whats up ?
> John Makar

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