@isaacovercast Hi, Isaac. I have been running several jobs in ipyrad 0.7.17 via qsub on our department's cluster. These jobs were in the middle of running, and running fine, when our system was rebooted. After the system was rebooted, I resubmitted the jobs that had been running, and now they are being terminated with a signal 7 bus error. I contacted our department IT about this and they said that during the system reboot, nodes were upgraded to run kernel 2.6.32-696.18.7.el6.x86_64 (on CentOS 6.9), which is supposed to have some fixes for the recently announced Spectre/Meltdown vulnerabilities. These fixes change what processes see in their address space, which could correlate with these signal 7 bus errors I am seeing. Our IT is wondering whether the new kernel is a problem for ipyrad, and wanted me to find out from the developers what kernel you are using. Can you tell me, what kernel you are using? Thanks!