Netflow Application Graph not coming suddenly from 1st January

Hi,

I am using Linux based Netflow Analyzer build 9860 with embedded MYSQL. All was working fine till 31st December but since 1st January,i have observed that devices interface graphs are working fine and shows graph but APPLICATION HOURLY graph is not displaying while 6 Hours APPLICATION graph is displaying fine.

I have done some researched and performed below steps but in vain.

1. Stop NetFlow Analyzer service.

2. Open command prompt as administrator and navigate to NetFlow_Home/troubleshooting

3. Execute rawCleanup.bat and wait until the process completes.

4. Exclude complete NetFlow_Home directory from any antivirus scan or automatic backup application running in the server.

5. Tune NetFlow Analyzer as mentioned in the below link:

For Mysql :

https://forums.manageengine.com/topic/nfa-professional-edition-performance-tuning-tips

4. Start the NetFlow Analyzer service and navigate to Admin--> Storage Settings --> Raw Data Settings and select Retain Raw Data to the lowest time period and check on the issue.

Kindly find the attached files of Hourly graph and 6 hours graphs for your reference.

Kindly advice on the said matter.