#8 kill process when I want to scan sample for second time via running CIRI2

[Mohammad]

Hi,
I run CIRI2 for my data set and I recive below message:

[Wed Jun 6 22:21:30 2018] CIRI begins running
[Wed Jun 6 22:21:30 2018] Loading reference
[Wed Jun 6 22:22:53 2018] First scanning
Worker 1 begins to scan myfile.sam.
Worker 1 finished reporting.
Candidate reads with splicing signals: 20
Candidate reads with PEM signals: 20
Candidate circRNAs found: 2
[Wed Jun 6 22:31:49 2018] Second scanning
Worker 2 begins to scan myfile.sam.
Killed

As you see, CIRI2 can pass First Scanning but for Second round it can't pass and will be killed. Could you please share your comment with me.

P.S: My server RAM is 8 GB and myfile.sam size is 8.9GB.also my OS is Ubunu 16.4