When your application calls the login function, the SDK:
This is the most common fix for Error 23 on cameras manufactured after 2019.
In iVMS-4200, click "Add Device" (or modify existing device).
Change the "Add Method" from "IP/Domain" to "Hikvision Private Protocol." hikvision error code hcnetsdkdll 23 verified
Enter the following:
Click "Add."
Why this works: The Security Code acts as a second factor. Without it, the SDK will throw Error 23 even with a correct password. When your application calls the login function, the SDK:
Based on Hikvision’s official SDK release notes and network trace analysis, the following are confirmed triggers for error 23:
Use Wireshark to filter traffic on port 8000:
Use SADP Tool (Hikvision’s official device discovery tool) or the device’s web interface: This is the most common fix for Error
Use NET_DVR_SetLogToFile(3, "C:\\SDKLog\\") before login. The generated log file will show the exact step where error 23 occurs.
Example log snippet:
[ERROR] Login failed: error 23
[DEBUG] Sent username: admin
[DEBUG] Device response: Authentication failed