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In Hikvision systems (such as iVMS-4200 or custom SDK applications), Error Code 23 (NET_DVR_NOSUPPORT) indicates that the requested function is not supported by the connected device. This usually occurs when a software feature is triggered that the hardware—such as a specific camera or NVR model—physically lacks or does not have the firmware capability to perform. Core Identification Error Message: NET_DVR_NOSUPPORT Code Number: 23
Technical Meaning: The device communication library (HCNetSDK.dll) attempted to execute a command that the end-device returned as "not supported". Common Triggers
Unsupported PTZ Commands: Attempting to use Pan-Tilt-Zoom (PTZ) controls on a fixed camera that does not have mechanical PTZ capabilities.
VCA/Smart Event Searching: Trying to perform "Smart Searches" or Video Content Analysis (VCA) on storage devices like NAS drives that do not support these specialized metadata functions.
Recording Template Mismatch: Switching a recording template to "Event" on older iVMS-4200 PC-NVR versions that may not support event-based storage protocols.
Hardware Limitations: Requesting a specific stream type (e.g., H.265+) or resolution that the NVR or camera hardware is physically unable to process. Troubleshooting & Verified Solutions
To resolve Error 23, focus on aligning software requests with hardware capabilities:
Verify Device Specifications: Consult the Hikvision Datasheet Library for your specific model to ensure it supports the feature (e.g., PTZ, Audio, VCA) you are trying to use.
Update Firmware: In some cases, a feature is supported by hardware but requires a newer firmware version to be "unlocked" or recognized by the SDK. Check for updates on the Hikvision Support Portal.
Check User Permissions: While Code 23 is usually functional, ensure your user account has the necessary "Remote Configuration" permissions, as restricted access can sometimes cause the system to return a generic "not supported" response.
Reset Recording Templates: If the error occurs during storage configuration, revert recording schedules to "Continuous" or "Motion" rather than "Event" to see if the hardware supports standard triggers instead. hikvision error code hcnetsdkdll 23 verified
Use the SADP Tool: Use the Hikvision SADP Tool to verify the device is correctly initialized and visible on the network with the correct IP parameters. How to Solve Hik-Connect Offline Issue - Hikvision
Hikvision Error Code HCNetSDK.dll 23 Verified: What Does it Mean and How to Fix It
Hikvision is a well-known brand in the security camera industry, providing a wide range of products and solutions for surveillance and video recording. However, like any other software or hardware, Hikvision devices and software can also encounter errors and issues. One such error that users may come across is the "HCNetSDK.dll 23 verified" error. In this write-up, we will explore what this error means, its possible causes, and provide troubleshooting steps to resolve it.
What is HCNetSDK.dll?
HCNetSDK.dll is a dynamic-link library (DLL) file that is part of the Hikvision SDK (Software Development Kit). The SDK is a set of tools and libraries that allows developers to create software applications that interact with Hikvision devices, such as IP cameras, NVRs, and DVRs. The HCNetSDK.dll file is responsible for providing a set of APIs (Application Programming Interfaces) that enable communication between the Hikvision device and the software application.
What does the Error Code 23 mean?
The error code 23 in HCNetSDK.dll typically indicates that there is an issue with the network connection or communication between the Hikvision device and the software application. Specifically, it means that the software application is unable to connect to the Hikvision device or retrieve data from it.
Possible Causes of the Error
Based on various user reports and Hikvision support resources, the following are some possible causes of the HCNetSDK.dll error code 23:
Troubleshooting Steps
To resolve the HCNetSDK.dll error code 23, try the following troubleshooting steps:
If none of these troubleshooting steps resolve the issue, you may want to contact Hikvision support or a professional security camera technician for further assistance.
12345 or abcd1234 (but you should have changed this).Expected result: If the password was the only issue, the device comes online immediately.
Older Hikvision devices use basic MD5 encryption. Newer firmware (post-2020) uses digest authentication or RSA encryption. If you are running an outdated version of iVMS-4200, it cannot negotiate the encryption method, and verification fails.
admin.Tip: Try logging into the device directly via its web interface (IP address in a browser). If that fails, the issue is definitely the credentials.
Error code 23 verified failed almost always comes down to incorrect or blocked login credentials. Start by resetting the device password, then work through permission and SDK compatibility checks. In most cases, simply re-adding the device with the correct password resolves the issue.
If none of the above works, perform a hard reset of the Hikvision device (press the reset button for 10+ seconds) and reactivate it with a new password.
Would you like a printable checklist or a one-page PDF version of this guide?
Troubleshooting Guide: Hikvision Error Code HCNetSDK.dll [23]
If you're using iVMS-4200 or a custom Hikvision integration and encounter Error Code: HCNetSDK.dll [23] In Hikvision systems (such as iVMS-4200 or custom
, you’ve likely run into a "function not supported" conflict. This specific error occurs when the software tries to execute a command—like PTZ control or a specific recording search—that the connected hardware or current account simply cannot perform.
Here is a verified guide to identifying the cause and fixing the error. What Does Error Code 23 Mean? Technically defined as NET_DVR_NOSUPPORT , this error indicates that the device does not support this function
. It is not usually a "bug" in the software, but rather a capability mismatch between your interface and the camera/NVR. Common Causes & Verified Solutions 1. Unsupported PTZ or Smart Features
The most frequent trigger is trying to use Pan-Tilt-Zoom (PTZ) controls or VCA (Video Content Analysis) on a device that doesn't have those physical or software capabilities.
Verify your camera model's datasheet. If the hardware lacks PTZ motors or specific smart event detection (like facial recognition), you cannot trigger these features via iVMS-4200. 2. Recording Template Mismatch (PC-NVR)
If you are using the iVMS-4200 Storage Server (PC-NVR), switching your recording template to
can trigger Error 23 if your storage device (like a NAS) does not support Video Content Analysis. Change the recording schedule back to "Continuous"
or "Scheduled" instead of "Event-based" if your hardware doesn't support VCA searches. 3. Permission and Account Issues
In some configurations, Error 23 mimics a "not authorized" state where the current user level (Operator vs. Admin) isn't allowed to perform the requested task. Log in using the account to see if the error persists. If it works for Admin, go to Remote Configuration > System > User Management
and ensure the Operator account has "Remote Live View" and "Playback" permissions assigned. 4. Stream Type Incompatibility Network connectivity issues : Poor or unstable network
Trying to open an audio stream on a channel that doesn't support audio, or requesting a "Sub Stream" that hasn't been configured, can also trigger this response. Right-click the camera channel in and manually select Main Stream Image > Video & Audio
settings to ensure the "Video Type" is set to "Video & Audio" only if your camera has a built-in microphone. Quick Checklist for Developers If you are receiving this error while using the Hikvision SDK , check your code for these common pitfalls: NAS drive and hikvision camera: Failed to search file
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