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App will freeze in Windows 8 when scanning with TWAIN 2.X

Forums › TWAIN Classic › App will freeze in Windows 8 when scanning with TWAIN 2.X

  • This topic has 1 reply, 2 voices, and was last updated 7 years, 9 months ago by lcarrere.
Viewing 2 posts - 1 through 2 (of 2 total)
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  • April 9, 2013 at 1:53 am #22815 Reply
    Massay
    Participant
    • Topics - 9
    • Replies - 2
    • Total Posts - 11

    1. In WIN8, after finish scanning, and preparing for data transferring, there is incorrect return code feedbacked. nRetCode = DSMEntry(&m_AppId, &m_DsID, DG_CONTROL, DAT_EVENT, MSG_PROCESSEVENT, (TW_MEMREF) &event);
    The “TWRC_NOTDSEVENT” is always feedback. It cause app always waits for driver’s next action.
    1.1 It only reproduces with TWAIN2.x(TWAINDSM.dll). It is OK with TWAIN1.x(TWAIN_32.dll).
    1.2 It only reproduces in WIN8. It is OK not in XP and WIN7.
    1.3 TWAINKit(TWACK) and twainapp.win32.installer.msi can get the same issue with TWAIN2.x.

    2. The issue occured on most of driver, for example: EPSON S50, Brother 8860DN, HP 7650Models.

    April 17, 2013 at 9:16 pm #25782 Reply
    lcarrere
    Participant
    • Topics - 2
    • Replies - 15
    • Total Posts - 17

    Hello Massay,

    Have you tried the latest 2.2.1 DSM? It fixes a callback issue on win8. I’ve encountered the sames problem you’ve described that was resolved with this DSM.
    see: http://sourceforge.net/projects/twain-dsm/

    Kind regards,

    Loïc

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Reply To: App will freeze in Windows 8 when scanning with TWAIN 2.X
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