Hello Bijaya, "Killed by signal 9" means that your process was killed with SIGKILL signal. For the record, this can be done manually by issuing command `kill -9 <pid>` by user that started the process, or by system administrator (e.g., via root login, sudo, etc.). However, in your case it's most likely caused by operating system itself, specifically oom-killer (out of memory condition causes Linux to kill processes which it considers the most "bad" at the moment in terms of their "oom score"). Please check `dmesg` output, it's very likely to indicate what exactly happened to your cp2k process. -- You received this message because you are subscribed to the Google Groups "cp2k" group. To unsubscribe from this group and stop receiving emails from it, send an email to <a href="mailto:cp2k+unsubscribe@googlegroups.com">cp2k+unsubscribe@googlegroups.com</a>. To view this discussion visit <a href="https://groups.google.com/d/msgid/cp2k/9c4a471d-1ea1-4a9c-b8d8-9d1510ab5c04n%40googlegroups.com?utm_medium=email&utm_source=footer">https://groups.google.com/d/msgid/cp2k/9c4a471d-1ea1-4a9c-b8d8-9d1510ab5c04n%40googlegroups.com</a>.