The is an explicit communication error message indicating that your client software has failed to receive data from the device . It frequently presents itself during live views or camera playbacks in central management applications like the Hikvision iVMS-4200 client.
NET_DVR_Init(); // Must be called first NET_DVR_SetConnectTime(2000, 1); // optional, but good practice NET_DVR_SetReconnect(10000, true); // Then proceed with login hcnetsdk.dll 9 hikvision error