I don't remember exactly. I was searching the _internal logs after installing. Today I walked through the install process again and I don't see that error, basically seeing info messages each time the script runs.
07-21-2016 15:58:16.857 -0400 INFO ExecProcessor - message from "python "C:\Program Files\Splunk\etc\apps\TA-DUOSecurity2FA\bin\duo.py"" no checkpoint time returned, using history value
07-21-2016 15:58:16.857 -0400 INFO ExecProcessor - message from "python "C:\Program Files\Splunk\etc\apps\TA-DUOSecurity2FA\bin\duo.py"" Using checkpoint time 1466539096
However not seeing anything within the splunk indexes or in the 'Auth API' log on Duo Admin panel.
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