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Duplex issue with Clarity USB Scanner

Forums › TWAIN Classic › Duplex issue with Clarity USB Scanner

  • This topic has 2 replies, 2 voices, and was last updated 15 years, 2 months ago by GisMe.
Viewing 3 posts - 1 through 3 (of 3 total)
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  • November 2, 2005 at 6:50 pm #21810 Reply
    GisMe
    Participant
    • Topics - 2
    • Replies - 1
    • Total Posts - 3

    Has anyone had experience with the ‘WIA-Clarity USB Scanner’ driver? A customer says the CAP_DUPLEXENABLED fails, even though it’s returned as one of its capabilities.

    I had them run a utility and found the MSG_GETCURRENT was returning TWRC_FAILURE with a conditon code of TWCC_BADCAP, which simply seems to mean that the driver does not support this feature. Yet it’s returned when checking CAP_SUPPORTEDCAPS.

    They also tested with TWACK_32 and it reports that it can successfully change CAP_DUPLEXENABLED.

    Every scanner I’ve tested that supports duplex works with our component, so I’m wondering if the driver is funky and TWACK_32 found a workaround. Any information is appreciated.

    November 3, 2005 at 4:33 pm #23147 Reply
    Thierry
    Participant
    • Topics - 6
    • Replies - 54
    • Total Posts - 60

    Check from the source code of TWACK_32 if there is a workaround, but basically, why are you using WIA interface instead of TWAIN ?

    November 7, 2005 at 2:22 pm #23148 Reply
    GisMe
    Participant
    • Topics - 2
    • Replies - 1
    • Total Posts - 3

    The end-user is using a WIA driver. There is nothing we can do about that. We don’t treat a WIA driver any differently than TWAIN, which may be part of the problem.

    I’ll take a look at the TWACK code.

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Viewing 3 posts - 1 through 3 (of 3 total)
Reply To: Duplex issue with Clarity USB Scanner
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