: Sometimes a hung process is the culprit. Open Task Manager , find all Smart PSS processes, select "End Task," and then relaunch the application.
: Examine system logs on both the client and server sides for more detailed error messages that can pinpoint the issue. failed to start playback netsdk returns error smart pss best
: If you can see live views but playback fails, the storage (SD card or HDD) might be corrupted. Users have found that reformatting the SD card or checking the HDD status on the NVR often fixes the issue. : Sometimes a hung process is the culprit
: Discrepancies between the camera, NVR, and PC time can cause the timeline to fail. Synchronize all devices to the same NTP server or NVR time. Network Stability : If you can see live views but
Download a compatible dhnetsdk.dll file from a trusted provider like Cornick Support . Close SmartPSS.
: Try to initiate playback from a different client or on a different device to isolate the issue.
: Playback requires more bandwidth than live viewing, especially for multiple channels. If your connection is "spotty" or you are using a mobile hotspot, the request may timeout.