Scanning using a scanner may cause a TWAIN aware application to hang
This article provides a resolution for the issue that scanning using a scanner may cause a TWAIN aware application to hang.
Original product version: Windows 7 Service Pack 1
Original KB number: 982436
Source: Microsoft Support
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When a 32-bit TWAIN aware application scans using a WIA driver on a 64-bit Windows Vista or Windows 7 system, the TWAIN application may stop responding.
If you leave the scan dialog open for about 10 minutes before you push the [Scan] button, the message used to transfer the scanned image from the WIA driver to the TWAIN application is not sent to the TWAIN application.
This problem can be avoided by doing either of the followings:
Scan image soon after you open the scan dialog.
Use a WIA aware application, not a TWAIN aware application.
This behavior is by design.
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