It is always annoying when something breaks.
If the DVM-200 shows the message pu or bu secid is not exist (with a number behind it), you can try to log off the camera and log on again according to the manual. You can also try to connect the camera to another channel.
If this does not solve the problem, then there is an error in the software of the DVM-200.
Therefore the unit needs to be reported for repair, you can do this via this link.
By filling in this form, we immediately have all the information we need to help you.
Make sure you clearly mention that you get the "pu or bu secid is not exist" message in the complaint description, that way our mechanics know what's wrong and can fix it quickly.
Should you have any additional questions, you can always contact us via this website.
Please state the complaint clearly so that we can help you.