Hi, > [snapscan] read_calibration_data: snapscan_cmd command failed: > Error during device I/O [snapscan] calibrate: read_calibration_data > command failed: Error during device I/O [snapscan] > sane_snapscan_start: calibration failed.
the error occurs during quality calibration. It's a known issue that quality calibration as implemented in the snapscan backend doesn't work for epson scanners. For that reason the option is disabled for epson models (see snapscan-options.c, line 522ff). In this case the calibrate function should never be called (see snapscan.c, line 1600). Either you're using a wrong version of the backend or there's some issue with option handling on amd64. /Oliver
