In plain English, this error means that the SDK (the software on your computer) sent a command to the device (the camera/NVR), but the parameters of that command were invalid, or the device rejected the connection attempt due to a configuration mismatch.
Temporarily disable local or network firewalls to rule out blocked ports. Check Physical Connections: hcnetsdk.dll 9 hikvision error
How to Solve Live View Error on iVMS-4200 - FAQ - Hikvision Global In plain English, this error means that the