Hello!
When scanned using TWAIN, sometimes (not always, but often) the scanner driver hangs and stops responding. This occurs when the connection to the scanner is closed. In this case, all the scanned images were successfully received.
I attach a log of interactions with the scanner.
How to solve this problem?
******* Start a scan session **********
2018-07-17 11:24:25.538 DEBUG [10100] [isida::ImageScanning::scanning@178] Start scanning...
2018-07-17 11:24:25.538 DEBUG [10100] [isida::ImageScanning::sendTwainCommand@621] DSM_Entry: ID = 0, DG = 1, DAT = 3, MSG = 4
2018-07-17 11:24:25.538 DEBUG [10100] [isida::ImageScanning::sendTwainCommand@623] DSM_Entry result = 0
2018-07-17 11:24:25.538 DEBUG [10100] [isida::ImageScanning::getSources@708] Found scanner Id = 1, name = Xerox TWAIN Driver
2018-07-17 11:24:25.538 DEBUG [10100] [isida::ImageScanning::sendTwainCommand@621] DSM_Entry: ID = 0, DG = 1, DAT = 3, MSG = 5
2018-07-17 11:24:25.538 DEBUG [10100] [isida::ImageScanning::sendTwainCommand@623] DSM_Entry result = 7
2018-07-17 11:24:25.538 DEBUG [10100] [isida::ImageScanning::getSources@713] Found 1 sources.
2018-07-17 11:24:25.538 DEBUG [10100] [isida::ImageScanning::openSource@658] Open source 1.
2018-07-17 11:24:25.538 DEBUG [10100] [isida::ImageScanning::openSource@660] Source 1 found.
2018-07-17 11:24:25.538 DEBUG [10100] [isida::ImageScanning::sendTwainCommand@621] DSM_Entry: ID = 0, DG = 1, DAT = 3, MSG = 1025
2018-07-17 11:24:26.330 DEBUG [10100] [isida::ImageScanning::sendTwainCommand@623] DSM_Entry result = 0
******* Scanning device open **********
2018-07-17 11:24:26.330 DEBUG [10100] [isida::ImageScanning::scanning@188] Image format 3
2018-07-17 11:24:26.330 DEBUG [10100] [isida::ImageScanning::setResolution@764] Set resolution to 300x300
2018-07-17 11:24:26.330 DEBUG [10100] [isida::ImageScanning::sendTwainCommand@621] DSM_Entry: ID = 1, DG = 1, DAT = 1, MSG = 6
2018-07-17 11:24:26.330 DEBUG [10100] [isida::ImageScanning::sendTwainCommand@623] DSM_Entry result = 0
2018-07-17 11:24:26.330 DEBUG [10100] [isida::ImageScanning::sendTwainCommand@621] DSM_Entry: ID = 1, DG = 1, DAT = 1, MSG = 6
2018-07-17 11:24:26.330 DEBUG [10100] [isida::ImageScanning::sendTwainCommand@623] DSM_Entry result = 0
2018-07-17 11:24:26.330 DEBUG [10100] [isida::ImageScanning::setColor@773] Set color to 1
2018-07-17 11:24:26.330 DEBUG [10100] [isida::ImageScanning::sendTwainCommand@621] DSM_Entry: ID = 1, DG = 1, DAT = 1, MSG = 6
2018-07-17 11:24:26.330 DEBUG [10100] [isida::ImageScanning::sendTwainCommand@623] DSM_Entry result = 0
2018-07-17 11:24:26.330 DEBUG [10100] [isida::ImageScanning::setDuplex@782] Set duplex to 0
2018-07-17 11:24:26.330 DEBUG [10100] [isida::ImageScanning::sendTwainCommand@621] DSM_Entry: ID = 1, DG = 1, DAT = 1, MSG = 6
2018-07-17 11:24:26.330 DEBUG [10100] [isida::ImageScanning::sendTwainCommand@623] DSM_Entry result = 0
2018-07-17 11:24:26.330 DEBUG [10100] [isida::ImageScanning::scanning@221] Timeout waiting scanning 180000
2018-07-17 11:24:26.330 DEBUG [10100] [isida::ImageScanning::scanning@228] Quality jpeg 70
2018-07-17 11:24:26.330 DEBUG [10100] [isida::ImageScanning::scanning@234] Scanning using event loop...
2018-07-17 11:24:26.330 DEBUG [10100] [isida::ImageScanning::sendTwainCommand@621] DSM_Entry: ID = 1, DG = 1, DAT = 9, MSG = 1282
2018-07-17 11:24:27.404 DEBUG [10100] [isida::ImageScanning::sendTwainCommand@623] DSM_Entry result = 0
2018-07-17 11:24:27.404 DEBUG [10100] [isida::ImageScanning::sendTwainCommand@621] DSM_Entry: ID = 1, DG = 1, DAT = 2, MSG = 1537
2018-07-17 11:24:27.404 DEBUG [10100] [isida::ImageScanning::sendTwainCommand@623] DSM_Entry result = 4
******* The process of stream scanning started **********
2018-07-17 11:24:27.404 DEBUG [10100] [isida::ImageScanning::transferImageLoop@324] Event loop message = 257
2018-07-17 11:24:27.404 DEBUG [10100] [isida::ImageScanning::transferImageLoop@326] Event loop message MSG_XFERREADY...
2018-07-17 11:24:27.404 DEBUG [10100] [isida::ImageScanning::sendTwainCommand@621] DSM_Entry: ID = 1, DG = 2, DAT = 260, MSG = 1
2018-07-17 11:24:36.974 DEBUG [10100] [isida::ImageScanning::sendTwainCommand@623] DSM_Entry result = 6
2018-07-17 11:24:36.974 DEBUG [10100] [isida::ImageScanning::saveDIB@483] Save dib to C:\Users\test\page_0.jpg
...skipped...
2018-07-17 11:25:29.948 DEBUG [10100] [isida::ImageScanning::sendTwainCommand@621] DSM_Entry: ID = 1, DG = 1, DAT = 5, MSG = 1793
2018-07-17 11:25:30.888 DEBUG [10100] [isida::ImageScanning::sendTwainCommand@623] DSM_Entry result = 0
******* All 24 sheets are scanned **********
2018-07-17 11:25:30.888 DEBUG [10100] [isida::ImageScanning::sendTwainCommand@621] DSM_Entry: ID = 1, DG = 1, DAT = 9, MSG = 1281
2018-07-17 11:25:30.889 DEBUG [10100] [isida::ImageScanning::sendTwainCommand@623] DSM_Entry result = 0
2018-07-17 11:25:30.889 DEBUG [10100] [isida::ImageScanning::sendTwainCommand@621] DSM_Entry: ID = 0, DG = 1, DAT = 3, MSG = 1026
******* The session hovered on command 1026 (close data source)**********
******* The process is forcibly removed by the task manager. Start of the next scan **********
2018-07-17 11:55:59.769 DEBUG [6200] [startLog@73] Start IsidaImageScanning...
2018-07-17 11:55:59.770 DEBUG [6200] [isida::ImageScanning::initScanning@132] Start initScanning...