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Failed to Invoke the Security Expert Suprema Component

The error "Failed to Invoke the Security Expert Suprema Component" is seen when attempting to register a users biometric credential at a Security Expert Client machine.

sx_suprema_client_dll_error_crop.pngFigure 1 - Suprema scan error

When doing a registration from the Security Expert Server this error is not seen and the registration is successful.

Product Line

Security Expert


  • Security Expert
  • Suprema Biometric Reader


The Suprema.dll has not been properly registered on the local machine.


First check in C:\Program Files (x86)\Schneider Electric\Security Expert folder and confirm that the three files Suprema.dllBS_SDK.dll, and BS_SDK_V2.dll are all present. If they are not you will need to copy them over from a working installation of Security Expert.

Now run the below commands via an Administrator authenticated command prompt session:

For 64-bit machines

  1. cd C:\Windows\SysWOW64
  2. regsvr32.exe “C:\Program Files (x86)\Schneider Electric\Security Expert\Suprema.dll”

For 32-bit machines

  1. regsvr32.exe “C:\Program Files\Schneider Electric\Security Expert\Suprema.dll”

You should get a pop-up saying the .dll was registered successfully.
Close and re-open the Security Expert client and re-test enrolling a users fingerprint.

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