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In Hikvision security systems, the HCNetSDK.dll file is a core communication library used by client software (like iVMS-4200) to interact with hardware devices. When this library returns , it indicates a fundamental mismatch between the command issued by the software and the actual capabilities of the connected device. 2. Technical Definition
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.
