If the error occurs during playback or recording setup, verify your template settings: Open and navigate to Storage Schedule .
If a specific ISAPI endpoint is not supported, consider implementing the required functionality through the standard SDK API (HCNetSDK.dll) instead. hikvision error code hcnetsdkdll 23 better
Troubleshooting Guide: Fixing Hikvision Error Code HCNetSDK.dll[23] If you’re seeing Error Code HCNetSDK.dll[23] Hikvision iVMS-4200 software or NVR, it essentially means "Function Not Supported" If the error occurs during playback or recording
Implement a pre-check routine using the SDK's ability-get functions (like NET_DVR_GetDeviceAbility ) to verify if a feature is supported before executing it. If you have an older device, its firmware
If you have an older device, its firmware may simply be out of date. Hikvision constantly updates its device protocols. An iVMS-4200 client built for 2024 protocols might try to use a command on a camera running firmware from 2016 that doesn't recognize it.
Click and reboot the device to apply the parameters safely. 2. Manage Concurrent User Connections