Error Link: Hcnetsdk.dll 9 Hikvision

Error Link: Hcnetsdk.dll 9 Hikvision

hcnetsdk.dll error 9

Here’s a structured troubleshooting paper for the on Hikvision devices/SDK.

Adjust Stream Settings:

Switch from "Main Stream" to "Sub Stream" for live viewing to reduce data load. hcnetsdk.dll 9 hikvision error

public uint dwSize; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 64)] public string sDeviceAddress; public ushort wPort; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 64)] public string sUserName; [MarshalAs(UnmanagedType.ByValTStr, SizeConst = 64)] public string sPassword; public uint dwLoginMode; // ... other fields (simplified) hcnetsdk

1. Check for User Initialization

If your camera or NVR is new or was recently reset, it likely requires "Initialization." Confirm file exists – hcnetsdk

NET_DVR_Init(); uint err = NET_DVR_GetLastError(); if (err == 9) MessageBox.Show("Error 9: DLL load failed. Install VC++ 2008 x86 and place all SDK files.");

Adjust Encoding Settings

: One reported "success story" involves disabling H.265/H.265+ encoding in favor of H.264. In some cases, playback only resumed after the encoding was changed and new footage was recorded over a 24-48 hour period.

  1. Confirm file exists – hcnetsdk.dll is in the same folder as your .exe.
  2. Install VC++ 2008 x86 – Reboot after installation.
  3. Copy entire SDK package – Not just the main DLL.
  4. Set platform to x86 – Force 32-bit mode.
  5. Disable antivirus temporarily – Test if it’s blocking.
  6. Use LoadLibrary to test: 
    HMODULE h = LoadLibrary("hcnetsdk.dll");
if (!h) std::cout << "LoadLibrary failed: " << GetLastError();
  7. Check Event Viewer – Windows Logs → Application → Look for SideBySide or module load errors.