Some biometric DLLs are flagged by antivirus as "Potentially Unwanted Programs" due to their low-level USB access.
"Exception 0xC0000005 – Access violation reading location 0x00000000." Cause: The calling application passed a null pointer or invalid handle to the DLL. This often occurs if ZKFP_Init() failed silently. libzkfp.dll
| Version | Year | Notable Changes | |---------|------|------------------| | 5.x | 2015-2018 | ISO template support, multi-device | | 6.x | 2019-2020 | ARM support, improved matching | | 7.x | 2021-2023 | 64-bit only, Windows/Linux cross-platform | | 8.x | 2024+ | Cloud-ready, FIPS compliance | Some biometric DLLs are flagged by antivirus as
To fix errors related to (typically "Unable to load DLL" or "Specified module could not be found"), follow these troubleshooting steps for the ZKTeco Fingerprint SDK: ⚡ Quick Fixes | Version | Year | Notable Changes |