Hcnetsdk.dll 23 (Ad-Free)

– The user is logged in already.

A hospital’s security dashboard showed intermittent "Error 23" when trying to display live feeds from 20 Hikvision cameras. The error occurred mainly after a server reboot.

: The most common trigger occurs when a user attempts to use Pan-Tilt-Zoom (PTZ) controls on a camera that is fixed and does not have a motorized gimbal.

: Failed to connect (device is offline or network timeout). hcnetsdk.dll 23

: In some cases, insufficient power supply (PoE) or incorrect network settings can trigger general SDK errors. Troubleshooting Steps Check Device Compatibility : Verify in the product specifications

If you get 23, try logging in with a different user (e.g., a newly created "temp" user) to see if the issue is user-specific.

In C++ or C#, developers

To help you distinguish between different issues, here are a few other common codes you might see alongside 23: : Incorrect username or password.

if the feature you are attempting to use is actually supported by your hardware. Update Firmware : Visit the official Hikvision Support Center

Are you seeing this error while or during video playback ? NAS drive and hikvision camera: Failed to search file – The user is logged in already

: The device firmware may be outdated or incompatible with the version of the SDK/software being used. Connection Limits

This means you are attempting to use a specific feature in the software that the connected hardware (DVR, NVR, or IPC) does not actually support. Common scenarios where this error appears include: Common Features Causing Error 23