The test matrix was triggered by a job on wowbagger, every 30 minutes. 30 * * * * $HOME/www.boost.org/testing/trigger_test_reports_new_server.sh This was enabled. Going further, the script checks if there are new results to process. Bizarrely, that test is always "successful" (the sha matches) which means there is nothing to process: [root@wowbagger testing]# cat results.lst | shasum -c results.sum [root@wowbagger testing]# echo $? 0 [root@wowbagger testing]# cat test.txt | shasum -c test.txt [root@wowbagger testing]# echo $? 0 The server is an obsolete CentOS release 6.10 (Final) which hasn't been rebooted in years. Something very peculiar is glitching in the "shasum -c" command. I have commented out the cron, and moved it to the newer regression server. CircleCI ran: https://app.circleci.com/pipelines/github/boostorg/regression The job results in this error: error: Unable to find file or target named error: '/boost/conversion//boost_conversion' error: referred to from project at error: '/root/project/boost-reports/boost_root/libs/numeric/conversion'