/usr/bin/simple-scan:11:sanei_genesys_generate_gamma_buffer:gl646_send_gamma_table:genesys_start_scan:sane_genesys_start:scanner_do_start

The Ubuntu Error Tracker has been receiving reports about a problem regarding simple-scan. This problem was most recently seen with package version 3.24.0-0ubuntu1, the problem page at https://errors.ubuntu.com/problem/3034378cc25bf3741cd155478aa661746da8a3df contains more details, including versions of packages affected, stacktrace or traceback, and individual crash reports.
If you do not have access to the Ubuntu Error Tracker you can request it at http://forms.canonical.com/reports/.