It usually appears out of nowhere. One minute, your Hikvision CCTV software (iVMS-4200, iVMS-5200, or an NVR firmware updater) is working fine. The next minute, a dialog box freezes your workflow with a red 'X'.
In the world of Hikvision protocol, translates to one specific, frustrating problem: "The current network is too poor to send data."
When the SDK stops shouting about the network and starts streaming silently, you know you've won. Have a different error code? Search our SDK error library for codes 1 (success) through 127 (unknown host).
This content is designed for a tech support blog, knowledge base, or software documentation site. If you manage security systems, you’ve likely encountered the dreaded cryptic error message: "HCNETSDK.DLL Error Code 23."
For installers: Always use substream for live viewing on workstations and reserve mainstream for recording only. For end-users: Disable IPv6 on the camera and drop your PC's MTU to 1400. You will never see Error 23 again.
