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Blank or Invalid Challenge Code While Using Windows 10 (Error 634a2)

If you're unable to authorize your Spectrasonics Instrument on Windows 10 due to a blank or invalid challenge code, or are receiving "Error 634a2", close your DAW or the standalone application, and re-open it with administrator privileges by following these steps:

  • Right-click the application and select "Run as Administrator", and select Yes to allow the app to make changes to your device.
  • Complete the authorization steps on screen.

If you have completed the steps above to run as administrator and are still receiving a blank or invalid Challenge code, perform the following steps to allow successful authorization:

  • Open C:ProgramData (NOTE: ProgramData is hidden by default, use Show Hidden Files to see it)
  • Right-Click on the Spectrasonics folder and select Properties
  • In Spectrasonics Properties select the Security tab, then the Edit button. 
  • From the Permissions for Spectrasonics window that opens, check Allow next to "Full Control" and "Modify" for ALL of your Group and User Names.
  • Press Apply and close Permissions.
 
  Restart your PC, load the Spectrasonics instrument(s) in your host/DAW and authorize them again.   If you still experience authorization issues, please make sure you disable all security software during authorization; or add your Spectrasonics Instruments / DAW as security exceptions in your security software.

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