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Date Posted: 19:04:07 05/03/05 Tue
Author: Michel
Subject: Re: Scanned Does 2 Passes With TWAIN
In reply to: Wade Auchterlonie 's message, "Scanned Does 2 Passes With TWAIN" on 19:12:45 04/28/05 Thu

Hi Wade,

I have not seen this. But I have not tried that scanner and driver. Are you sure there is not some setting in the drivers interface that may affect this?

Best regards,


>On XP, with an HP 4570C scanner, when the image is
>acquired the scanner does two passes and the image is
>transferred both times to the OnAcquire event.
>These two passes are in addition to the preview scan.
>That is, they happen after clicking the "Accept"
>button to begin the scan/transfer.
>Interestingly enough, this does not happen with the
>WIA driver, only with the TWAIN driver.
>Is this a software issue?
>The HP scanner driver is the latest version.
>This is reproducable with the demo app.

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