No subject

during device I/O".
==
Any thoughts?
==
last few lines from: SANE_DEBUG_EPJITSU=30 scanimage -b --source="ADF
Duplex" --resolution 150 2> s300.log:
...
...
[epjitsu] 4000 58 3f 4d 58 40 4d 58 40 4d 58 40 4d 58 40 4d 58
[epjitsu] 4010 3f 4d 58 40 4d 57 40 4d 57 40 4d 58 40 4d 58 40
[epjitsu] 4020 4e 58 40 4d 58 40 4d 58 40 4d 58 40 4d 57 40 4d
[epjitsu] 4030 58 40 4d 58 40 4d 58 40 4d 57 3f 4d 57 3f 4d 57
[epjitsu] 4040 3f 4d 58 3f 4d 58 40 4d 57 40 4d 59 40 4d 58 40
[epjitsu] 4050 4d 58 40 4d 58 40 4d 57 40 4d 57 40 4d 58 40 4d
[epjitsu] 4060 58 40 4d 57 40 4d 58 40 4d 58 40 4d 58 40 4d 58
[epjitsu] 4070 40 4d 58 40 4d 58 40 4d 58 40 4d 58 40 4d 58 3f
[epjitsu] 4080 4c 58 40 4d 57 40 4d 57 40 4d 58 40 4d 58 40 4d
[epjitsu] 4090 58 40 4d 58 40 4d 58 40 4e 58 40 4d 57 40 4d 58
[epjitsu] 40a0 40 4d 58 40 4d 58 3f 4d 58 40 4d 58 40 4d 58 40
[epjitsu] 40b0 4d 58 40 4d 57 40 4d 58 40 4d 58 40 4d 58 3f 4d
[epjitsu] 40c0 57 40 4d 58 40 4d 58 3f 4c 58 40 4d 58 40 4d 58
[epjitsu] 40d0 40 4d 58 3f 4d 58 40 4d 58 3f 4d 57 40 4d 58 40
[epjitsu] 40e0 4d 58 40 4d 58 40 4d 58 40 4d 57 3f 4d 58 3f 4d
[epjitsu] 40f0 58 40 4d 58 40 4d 58 40 4d 58 40 4d 58 40 4d 57
[epjitsu] 4100 40 4d 58 40 4d 57 3f 4d 57 40 4d 58 3f 4d 57 40
[epjitsu] 4110 02 10 41 00 00 00 80 00
[epjitsu] in: short read 25544/16664
[epjitsu] do_cmd: finish
[epjitsu] read_from_scanner: got GOOD/EOF (16664)
[epjitsu] read_from_scanner: finish rB:8880 len:16664
[epjitsu] read_from_scanner: start rB:8880 len:8880
[epjitsu] do_cmd: start
[epjitsu] in: memset 8880 bytes
[epjitsu] in: reading 8880 bytes, timeout 10000
[epjitsu] in: retVal 9
[epjitsu] in: return error 'Error during device I/O'
[epjitsu] read_from_scanner: error reading status = 9
[epjitsu] read_from_scanner: finish rB:8880 len:0
[epjitsu] coarsecal: cant read from scanner
[epjitsu] sane_start: ERROR: failed to coarsecal
[epjitsu] sane_cancel: start
[epjitsu] sane_cancel: finish
scanimage: sane_start: Error during device I/O
[epjitsu] sane_cancel: start
[epjitsu] sane_cancel: finish
[epjitsu] sane_close: start
[epjitsu] sane_cancel: start
[epjitsu] sane_cancel: finish
[epjitsu] lamp: start (0)
[epjitsu] do_cmd: start
[epjitsu] cmd: writing 2 bytes, timeout 10000
[epjitsu] cmd: >>
[epjitsu] 000: 1b d0
[epjitsu] cmd: wrote 2 bytes, retVal 0
[epjitsu] in: memset 1 bytes
[epjitsu] in: reading 1 bytes, timeout 10000
[epjitsu] in: retVal 0
[epjitsu] in: read 1 bytes
[epjitsu] in: <<
[epjitsu] 000: 06
[epjitsu] do_cmd: finish
[epjitsu] do_cmd: start
[epjitsu] cmd: writing 1 bytes, timeout 10000
[epjitsu] cmd: >>
[epjitsu] 000: 00
[epjitsu] cmd: wrote 1 bytes, retVal 0
[epjitsu] in: memset 1 bytes
[epjitsu] in: reading 1 bytes, timeout 10000
[epjitsu] in: retVal 0
[epjitsu] in: read 1 bytes
[epjitsu] in: <<
[epjitsu] 000: 06
[epjitsu] do_cmd: finish
[epjitsu] lamp: finish
[epjitsu] disconnect_fd: start
[epjitsu] disconnecting usb device
[epjitsu] disconnect_fd: finish
[epjitsu] teardown_buffers: start
[epjitsu] teardown_buffers: finish
[epjitsu] sane_close: finish
[epjitsu] sane_exit: start
===