Hello,
It seems the installation rollback is caused by a custom action failure. Just check the 1179 line in your log and you will see that your "InFlow.exe" custom action has a
return value of 3. Any custom action return code different than 0 is interpreted by Windows Installer as a failure. So, you should make sure your custom action returns 0 when runs successfully.
If your custom action has indeed failed to successfully run, then you should try to debug it.
Also, if you want the custom action return code be ignored, then you can uncheck the "Fail installation if custom action returns an error" execution option for your custom action.
If there is anything we can assist you with just let us know.
All the best,
Daniel