Once you resolve the error, prevent it from recurring:
Below is a comprehensive guide to understanding why this error occurs and the step-by-step troubleshooting methods to resolve it. Understanding the Causes of the Error
Enable to sync with an online time server, or manually match your PC’s exact time. Sync your PC time via Windows Settings. Restart Smart PSS and try the playback again. 2. Verify User Account Permissions Failed To Start Playback Netsdk Returns Error Smart Pss
Logs and debug
Log into NVR via web browser → Playback tab. If same error appears → issue is on device side (firmware/HDD/permissions). Once you resolve the error, prevent it from
If specific DLL libraries are corrupted, manual replacement forces playback capability to return.
Change the stream type from to Sub Stream (or vice versa). Try searching and playing the footage again. 2. Synchronize Time and Date Settings Restart Smart PSS and try the playback again
Under the tab, look for any remaining instances of SmartPSS or associated background communication tasks. Right-click the process and select End Task . Relaunch the application. 2. Run SmartPSS as an Administrator
: Port conflicts or firewall blocks can prevent the SDK from establishing a playback stream.
: Ensure that DST is correctly enabled and synced on your NVR/DVR settings. Often, the issue resolves itself automatically after 24 hours (at midnight) once the system settles into the new time cycle. 2. Update the dhnetsdk.dll File
The account logged into Smart PSS lacks the authority to search or stream recorded files.