Gscan2pdf error during device i/o error

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sane network scanner

sane-pixmaxsane failed to open device error during device i/o

scangearmp

linux samsung network scanner

simple scan error communicating with scanner

error: sane: error during device i/o (code=9)

scanimage: sane_read: error during device i/o

which came with this software (README, FAQ, manpages). # xsane [sanei_debug] Setting debug level of snapscan to 10. [snapscan]
Exactly the same in my case (including what edit 1 reports) on Ubuntu 18.10, amd64 machine, Pixma MG3650. export SANE_DEBUG_PIXMA=128. gave:
Jul 31, 2011 –
Jun 6, 2020 –
Mar 4, 2015 -Nov 13, 2018 –
Apr 25, 2012 –
Aug 5, 2006 –
When I trigger a scan, it seems to start (you hear the scanner beginning > to engage), but then gscan2pdf echoes back: “Error during device I/O.” If I close the
Mar 7, 2016 –

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