3 cameras monitor the perimeter of the building and a 4th is inside mostly operating on IR as there are no windows.
There is a schedule set for each camera with all squares marked to record motion 24/7 every day.
Sensitivity of each camera is set to around 5 or 6 for daytime use and around 20 for night-time.
Each camera has a mask enabled to cover areas where movement is likely and exclude those such as trees which might give false alerts.
The system has been working fairly well up until a few weeks ago when we adjusted some sensitivity settings to try and avoid it triggering in snow and heavy rain. However it now does not record human movement on the 3 external cameras, only on the internal one. This is so even though we have reverted to the usual settings. (as above).
One thing I have noted is that it often gives "Configuration Failed" when I go to change and save settings, and I often have to repeat pressing the OK button until it says "Configuration Saved". I'm wondering if the internal lithium battery needs replacing? Or can anyone suggest any other reason to cause this change in behaviour? Sometimes it needs a reboot to work at all (even though it is set to Auto-reboot weekly).
The system information screen shows it is a DVR4-4100, running Build 1224, H/W No TNMB01. Cfg Version is v18.104.22.168 and the F/w version shows up blank.
The HDD is set to Overwrite.
I'm happy to check and provide any other info required to help resolve this.
Best answer by andrewc
Just visited the site and local settings were all correct. So I changed the battery on the m/b and did a factory reset then reconfigured all the Motion settings.
Seems to be working OK now so must have been a software glitch.