Just to be clear: the application reported DISK ERRORS, not just that it quit. But it reported all three errors within minutes of each other after run...

Alright, so I started over from scratch. 2 of the original 4 drives passed certification with the GUI app. Previously it had reported that 3 of 4 fail...

Very sorry about this. You can certify via command line, but our command line tool does not yet know how to "resume", so you would have to start over....