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Suppress Error Messages

Forums › TWAIN Classic › Suppress Error Messages

  • This topic has 1 reply, 2 voices, and was last updated 10 years, 6 months ago by peterp.
Viewing 2 posts - 1 through 2 (of 2 total)
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  • October 13, 2010 at 12:07 pm #22636 Reply
    hendrik
    Participant
    • Topics - 1
    • Replies - 0
    • Total Posts - 1

    Hi I am new to using the twain driver in applications. I have a sheet fed
    scanner. I therefore have to feed a sheet into the scanner before i can can
    scan the page. I am trying to scan documents without having to press
    buttons on the device or in my application (scan start automatically when
    paper is detected in feeder).

    I have written an application in VB where I repeatedly call the acquire
    method until I stop it. The problem I have is that a error message box pop
    up the whole time indicating that there is no paper in the feeder. When I
    click on the ok button the message box disappear and the scanner tries
    again with the same msg box appears.

    ❓
    Is there a way of suppressing the error that there is no paper in the feeder
    or is there a better way of starting the scan process automatically when a
    paper is fed into the feeder.

    Any help is welcome, thanx

    October 19, 2010 at 6:00 pm #25337 Reply
    peterp
    Participant
    • Topics - 0
    • Replies - 30
    • Total Posts - 30

    You should look at page 4-27 of the TWAIN 2.1 spec – ‘Transfer of Multiple Images’. In that section on page 4-29 is a subsection called ‘Use of a Document Feeder’.

    This will tell you how to tell if your scanner has one or more document feeders, how to select a particular document feeder, and how to determine if there is paper currently in the document feeder (or how to tell if your scanner is unable to tell you if there is paper loaded).

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Reply To: Suppress Error Messages
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