System date changed and prtg stopped

Quick and simple fix for this:

1. Stop PRTG services
2. Open up the monitoring database folder
3. Remove all folders with date names from future date and the current date (note that the data will be lost for these days)
4. Restart the PRTG Services
5. Navigate to Setup | System Configuration | Administrative Tools and recalculate the graph cache

Afterwards, everything should be back to normal. Let me know if it worked!

Kind regards,
Stephan Linke, Tech Support Team

Hello Did that and now all ports are showing dark grey but it should be green. The error

This sensor has not received data for 5 days 5 hours 57 minutes. Please check "SNMP Delay" channel of core/probe health sensor. Consider distributing your SNMP sensors across several probes!

Thanks

They should indeed be green. Kindly open up a support ticket via Setup | Contact Support and use PAE1079481 as case number. It will be logged accordingly then.

Kind regards,
Stephan Linke, Tech Support Team

Ok done. Thanks.

To test I changed date to near future and graphs are green and data is processing. Even though there are no folder of future date in monitoring folder but still problem persist. Any other folder also need to be removed ?

Please also try to remove the folder with the date where the date shift actually occured. Does it work then?

Kind regards,
Stephan Linke, Tech Support Team

Could you please be more specific? Under which folder do you mean?

Within the monitoring database directory, under C:\ProgramData\Paessler\PRTG Network Monitor. Note that the directory might've changed, depending on what you have configured.

Kind regards,
Stephan Linke, Tech Support Team

There is folder of file from future date. I changed date to 31st Aug 2018 and now graphs are green and traffic is flowing. But the moment I change to today date it stops. Is there any other setting need to be changed?

Just to make sure: You need to delete folders with a future date and the folder with the date of the date switch. Otherwise it won't work properly. Changing dates back and forth won't do the trick here.

Kind regards,
Stephan Linke, Tech Support Team

But there is no more folder of future date http://prntscr.com/kly4f0

Then please stop the PRTG Core Service, rename the Monitoring Database folder to Monitoring Database.old and restart the service. The graphing should work properly then :)

Kind regards,
Stephan Linke, Tech Support Team

We followed these steps. 1. Stopped the core services. 2. Stopped the probe services. 3. Rename the monitoring database folder. 4. started probe and core services. Didn't work. Restarted the server even and still didn't work. If we set date in future it will work does not matter which date :D So maybe there is some other file also which system is using which need to be deleted or renamed so it start working correct. Thanks

Usually not :) Could you open up a ticket with [email protected] (without a ticket ID), referring to this thread? We'll do a TeamViewer session then :)

Kind regards,
Stephan Linke, Tech Support Team

Updates: We deleted the old monitoring folder and restarted so now ports are green from grey and almost everything seems work fine only one issue. The graphs are not showing usage refer this https://prnt.sc/kmdt4d We opened ticket few days back but seems your team is busy. So maybe this is good channel to fix the issue.

We didn't get one :( If it works now, remove the PRTG Graph Data Cache.dat file and restart the core service. The graphs will then be recalculated. But live data should indeed work...lets see if removing the cache works.

Kind regards,
Stephan Linke, Tech Support Team